1
ttttttttttt � ��� � � � ��� � �
�� � � ��� � �
��� � � ��1�
2
���� � � ��� � �� � �� � � �� � � � � �
���� �� �� � � � � � � ��� � ���������� �
���� ��� �� � � � � � �� � � � �� � ������� �
���� � �� �� � ��� � � � � � � ���������� 1�
���� ��� � � � � � � ���� � � ������������ 1�
���� � ��� � � ��� � � ����������������� �� 1
���� �� �� � �� � � � � �� �� � ��������� �1
���� ��� �� � � � ��� � ������������� �� 2
���� �� � �� � ���� � � � � �� ����� ����� �
���� � � � � � �� �� � � � � �� � � � � � � � � � ��� �1
3
� � � � � � � � �
� ��� � � ���� � ��� � � �� � � � � �
�� � � � � � � � � � � � �� � �� � � ���
� � � � �� ��� � �� � ���� � ���� � � ��
� � � � ���� � � � � �� � � � � � � � ��
�� �� �� � � � ����� � �� � �� � � �� �� � � �� �� � �
�� �� � ��� � ����� � � �� � � � � � � �� � � �
���� � � � �� ��� �� � ��� � �� �� �� � �� � �� � � � �
� �� � � � � � �� �� � ��� � � � � ���
� ��� �� � �� � �� �� � � � �� � � � ��� � � �
� � �� � � � � ���� � �� � � � �� ��
� � � �� �� �
� ���� � �� � � � � � �
gtgtgtggttgtgtgtgtggtgttgtttgg� �� � � ��� � � ���1� 1�
� � � � � ���� � �� �� �� � �� � �� � � �
� � � � � � �� �� � � � ���� ���� � � � � �� � � �
� �� � � � �� � � � � � �� � � � � �
� ���� � �� � � � �� � � ���� � �
� �� � � ��� � �� �� � � � � � � � � ��� �� �
� �� � � � �� � ��� � �� � � $ � � �
� � �� � � � � �� ������ �� ��� $ � � � �� �� ��� �
� �� � � � � � � � � � �� � �� � � ��� � ���
� � � � � � � � � � �
� � � � � � � � � ��� � � � ���
�� � � � �� � � �� � � � � � � � � �� � � � �� �
� � �� ��� �� � � �� � � � � � � � � � � � � �
�� � � � �� � � � � �� � �� � ��� � � �� � �
� � � ���� � � �� � � � � � ���� � � �� � �
�� � � � � � � �� � �� � ��� � �� � � � � �� � �
��� � � � � � � � � � � � � ��� �� �
��� �� � �� � ��� �� � �� � � ��� � �
� � �� � � � � � � � �
�� �� � � � ���� � �� � � � � �� � �
� � � � � � ��� �� � � � ��� �� � �� � �� �
� � � � � � � � � � �� � � � �� � ��� � � � ����
� � � � � � ���� � � � � � � �
� � � � � � � � � � � � �
� � � � � � � � � � � � � � � � �� � �
� �� � � � � � � �� � � � �� � �� � � ��� � ����
�
� � � � � � � �
�� � � � � � � ��� � � � � � � � �� � ��
: aaa aa a a a r rr ar r r .
� �� � � � � � �� � � � ��
n �� � � � � �� � � � � �� � � � � � � ���
� � �� � �� ����� � � �� � � � �� � �� ���� � �� � � � � � �
�� � � � � � �� � � � � � � � � � �� � � � �� � �
� �� � � �� �� � � ��� ���
� � � � � �� � � � �� � � � � �
�� � �� ���� � � � � � �� � ��� � � � � � ��� � �
: : : :
� �� � ��
� � � � � � �� �
� � � � � � � � � �� � � � � � � � �� � � ���� � �
� � � � � � � � � ���� � ��� � � ��� � �� � � �
� � � � � � � � � � � �� � � � � ��� �� � �
�� � � � � � �� � �� � � �� �
� � � � � � � � � � � � � � � �� � � ���� � �
� � � � � � � � � � � � � � � � �� � ���
� � � � �� � � � �
� �� � � � � �� � � $ �� �� �� ��� �� ����
� ��� �� �� � � � � � � � � � � �� � � ��
�� �� � �� � � � �
�� �� � �� � � �
�� � �� � � �� �
� � � ������ �� ��� � � � � � � � ��
�
�� � � � � � � � � � � �� � � � � � ��
�� ��� � � �� � � � �� � ����� ���� ��� � � ���� $ �� ��
ttgtt�t�t tg�gt�t�tggt� � � � ��� � ���� � � ��
� � � � � � � � �� �� � � � �� � � �� ��� �� � �� �� �
� � � � � � � � � � � � ��� � �� � � �
� �� � � � ��
� � � � � �� � � � �� � �� � � �
� � �� ��� � � � � � � �� � � � �� � � ��� � �� �
� �� ��� � � ��� � � �� �� � � �� �� � � ��
� � � � � � � � � � � :
:
� � � �� � � � � � � �� ��� � � � � � �� ��
� � � � � � � � � � ��� ���
�� � � � �� � � � � � � �� � � � � �� � � � �� ���
� � � � � � � �� � � � � � � � � �� � � � �
�� �� � � � � � � � � � �� � � �
�� � � � � � � � � � � � � � ��� � � � � � �
� � � � � � � � � �� � � �
� � ��� � �� ��� � � � � �� � � � � � � �
: :
@ �� � � � � � �� � � � � �� � � � �� �� � � �� �� � �
@ � �� �� � ��� � � � � �� �� � � � � � � ��
� � � �� � �� � � �
@ � � �� � ��� � � � � � � � ������ ��
@ �� � � � � � �� � � � �� � � ��� �
��� � �� � � � �� �
@ �� ��� � � �� � �� � � ��� � ��
� � � ��
@ �� � � � � �� ��� ��� � �� �
@ �� � � � � �� � � � ��� � � � �
�
p n :
� �
@ � ���� �� � � � � � �� � � � �� � �
�� � � � � � � � � �� � � �� �
@ �� � � �� � � � � � � � � � � � � � �� � � ��
� � � � �� � � � � � � � � � � �
�� �� � �� ����� � �� � � �� �� � ��
@ � �� � �� � � �� � ��� �� �� �� � � � � �
� �� � � � ��� � � � �� �� � �� � � �
� � � � � � � � �� �
� � � �� � � � � � � � � ��� � � � � �� � � � � �� �
� � � � �� � �� � �� � � � � � � � ��
� � � � � � �� � � � � � � � � ��
�� � � � � � � �� � � � �� � � � � �
� � � �� � � � � � �� � �� � � � � � � �� � � � �
� � � � � � � � � � �� � � � � � �� � � � � � �
� � � � � � �� � � � � � � � � �� ��� � ��
� � � �� �� ��� � � � �� � � �� � � �
e � � � � � ��
�� � � � � �� � �� � �� � � � �
e
� � � � � � � � � � � �� �
�� � � �� �� �� � � ��� � � ��� � � � � � � ���� � � � � �
� � � �� � �� ��
� �� � � � � � � �� � �� � � � �� �
� �� � � � � � � � � � ��
�� � � � � � �� �� � � � � �� � �� � � �� � � � �
� � � � � � � � � � � � � � � �
�� � � � � ��� �� � � � �� � � � � � � ��
� �� � � � � � � ��� � �� � � �� � � � � �
� � � � �� �� � � � � � � � � � � �� � � �
� � ��� ��� � ��� � �� � � ��� � �� � � � � �
� � �� � � � �
� � ��� � ��� � �� � � � �� � � � � � �� � �
� � � �� � ��� � �� �� � � � � � � � � � � � � � �
�
� �� � � �� � ���� � � ��� � � � � � � � ��
� � � � � �� �� � � �� � �� � � � � ����� � � �� ��
� ��� � � � ��� � � ��� � � � � �� � �
�� �� � � � �� � � � � ��
� � ���� � ��� �� � �� �� � � � � �� � ����� � � ��
�� � � � � � �� �� �� � �� �� � � �� � �
� �� �� � � � �� � � � � � � ��� � � � � �
� � � � � � �� �� � �� �� � � � �� �� ��
� ��� � � � � �� �� �� ��� �� �� �� � �� �� � �� ��
1
� � � � � � �
� � � � � �� �� � ���� �� � � � �� � �� � � �
� �� � � � � � � �� �� � �� � � � �� ���� ��� � �� �� �
�� � �� � ���� ��
� � � � � �� gt��tt�t ttgtt�ggt �tt ��ttg�t�t
ttg�tgtt �g�t�t�t�t �t�t�t�tgttt �ttg�tgtggt�tt��t �t�t�ttt �tt �t�t�ttttt �g�t�t��t
��tggttgtg���t�tttttt�ttt�tt��tt�tgtttg��t�t�tttt�ttt�g�tggtgtt�gtt�t�t�ttt�tt�ttgtttggt
� � ��� � �� � �� ���� � � � � � � � �� � �
� �� � � � � � � � � �� � �� � � �� � � �� � �
� �� � � �� � � � � � � � �� � ���� � �
� � � � � �� � �� � � � � � � � �� � � �� �
� ���� � �� � � � � � � � � � � � � � ��� �� � �
�� � � � � ��� � �� � �� ���� � � �� � �� � � �
� � �� �� � �� � � � � � � � � � � � � � � �� � �
� �� � ��� ��� � ��� � �� � � � �� � �� � � � �� � � ��� �
�� ��� �� �� � � � � � �� � ��� � �
� � � � �� � � � � � � � ���� � � � � � �
���� � � � � � � �� �� � � � ��� �� �� � � � � � � �
� � � � � ��� � � � ���� � �� � � � �� � � �
� � �� �� � �� � �� ��� � � � �� ��� � � � � ���� �
� � � � �
�� � � � � � � � � � � �� � � � ��� �� �� �
� � � � � � � �� � � � � � � � �� �� � �� � ��� �� � �
� � �� � � � � � � �� � �� �� � � � � � � �
� � � � � � � � � � � � � � � � � � � � ��� �
:
� � � ��� � � �� � � � � � �� �� � � � �
���� � � � � ���� � � �� � � � � ���� � �
11
��� �� � � � � � � �� � �� � � � � � �����
���� �� ���� � ��� � � ��� � � � � �� � ��
: :
:
� � � � �
� ��� �� � � � � � ���� � � � � � ��� � �� �
� ��� �� � � � � � � � � �
� �� � � ���� � � � � � �� � � �
�� �� � � � � �� � � �� ��
�
.gt.. : 3
� � � � � �
12
� � � � � � �
� � � � � � � �
� � � � � � � � � �� �
� � �� � �
���� � � � �� � � � �� � �� �� �� � � ��� � � �� �
� � � � ���� � � � � � � �� � �
��� � � ��� � � � � ��� �� � ��� ��
: �
� � � ��� � �� �� � �
t
� ��� �� ��t ������ � ��� ���� ��� ���� � ��
� � � � � � � � � � �
gg.t t.ttttt tttttt ttg�gt�t�tttt�tt�tt
tttt�tgtt�tttt
1
11
2
-
-
=
å=
g
tg
C
g
t
t
13
� � � � � � � � � �� �
� � �� � � � �� � � � � � �
� � �� � � � �� � �� �� �� � � ��� � � �� �
� � � � ���� � � � � � � �� � � :
��� � � ��� � � � � ��� �� � ��� ��
����� � � � ��� � �
� � � ��� � �� �� � �
t
� ��� �� ��t ������ � ��� ���� ��� ���� � ��
� � � � � � � � � � �
� � � � �
tg�gt�t�tttt�tt�tt
1
� � � � � � � � � �� �
:
� � �� � � � �� � �� �� �� � � ��� � � �� �
����� � � � ��� � �
� ��� �� ��t ������ � ��� ���� ��� ���� � ��
1
gg�t�t�tt�tg���tttttt�gttt�t � �
� � �� � � �
�tt�t�t �tt t�gttttttt tt �g�t�tt�tt��ttt
ettettttt
� � � �
� � ��
�g�t�t�tg���tt�ttt�tt�tt�ttt
� � � � �� �� � � �
� � � � � � �� � � �� �� � �
�ttt�t tg�gt�t�tttt �tt gtt tt��tt�ttt tt �tt
gg�tgtt�
� � �
� � � �
� � � � � � � � � � � �
� � � ��� � �� � �
� � � � �� � ��
� � �� � � � �� � � � ���� � � � �� � � � �
�� � �
� � � � � �� � � � � �
� ��� � �� �� ��� ��� � �� �� ��� ��� � ���� �
�� � � � � � � � � ��� ��� � �� � �� � �� � �
� �� �� ��� �� � �� ��� � � � � � �� ��� �� ��
� � � �� � � �� ������ ��� ������� �����
e
� � � � � � �
� � � �� � � � �� � �� � �
� � � �� ��� �� � � �� � � � � � �
� � � � �� � � �� �� � � � �� ��� ��� �
2N1
N
wD×+
=
wD
1
�� � � �� �� � � � � � � � � � � �� � �
� � � �
� � � � � �� � � ��� � � �� � �� � �
� � � �� ��� � � �� �� �� � � �� � � �
� �� � � � � �� �� � ��
� � �� � �� � � � � � � � � � �� � � �
� � � � � � � � � �
p
� � � � � � � � � � � �
� � � � � � � �
N :
� �� � � �� � ��
�� � ���
� � � � �
� � �
� �� � �� ��
� ��� �� �� �
� � � � � ��
�����
:
� �
��� �
�� �� � �
1
� � � � � �
p � � � � ��� � ���� � � �
� � � � � � �� � ���� � � �� �� � ���
�� � � � � �� � �� �� � � � � � � �� �
� � � � �� �� � �� �
� �r � aa r � r r � ra r ra r � � �ara r
a rr ar ra r � ear ar rr r r t
t.gtgtttt.ttettttt � � � � tggtt�t�tt� � � � � � � ���� � � �
: teetttetgttt teetggtttt egggtetgt t
�� �� � ����� � � �� � � � ��� � � � �� � � �� � �
�ttttttt ttt�t�t�tttttt�tt �tt gtgtggt�g�t � � � ��� � �� � �
� ��� � ��� ��� � � � � etttttt tttttet t etttttt t t t
egetggtgtt tttttetgttettt
�ttgtttttt �tt gtt�t�tt $ ettgttttt t egggtetgt tt gtgt t�t�gtttttt tt
�gttt�tgttt
r er r e a
p : :
:
p � � ������ �� ��� �� ���� � ��� ��� ������
: : :
: : :
� � � � � � ��� � � � � � �� �� �� � �
� � ��� � ��� �� � � � ����� � � �� � � �� �
��� �� � ���� �� � � � � �� � � � � �� �
� ��� � � �� � � �� � � ��� � � �� � ��� � � � ��
�� ��� � ��� � � � � � � �� ��� � � ����� � �
1
� � � � � � � � �tggt�ttt �tgt�t�tt�t ���t�ttt
etgt t tt tt.igetetttetgt t tt
� � �� � � � ��� � �� � ��� � � �
��� � � �� � � � � � � � � �� � �� � � �� � ��
� � �� � � �� � � �� � �� � �� � � �� � � ��� ��
���� � � � � �
itetggttgt ttetgt t tt � � ��� � � � � � � � �
� �� �� � � �� � � ��� ��� � � � � � � � �
� � � � � � � � � � � � ��� � � � � �
� �� � � ��� � � �� ��� � �� � �� �
� ��� � � �� � ��� � ��� � �
��t�gttttt �tgtttgt�ttt � � � � � ��� � ���� �
� ��� � � � � � �� � � � � � � ���
� �� ��� � � �� ��� ���� �
� � �� � gtt.t t .tt tttttettttt :
� ��� � � � � �� ��� ��� �� � ��
��� ��� �� � � ��� ��� �� � �
ltt.t t.tteggttg � � �� � � �� � �� �� �� � ��� � � ��� �
:
:
�� ����� � � � � �� ����� � �� � �� ����� ���� � �
��� ����� � � � � � t�tgtt�tt��tt �� ��� � � ��� � � � � � �� � �
� � �� � � � �� � � � � � � � � � � � �
� � � �� � � � � � �� � � � � � � �� � � � ��
� � � � �� � � � � � � � � � �� ���� � � � ��
� � � � ���� � � � ���� �
1
p
��� � � ��� � � �� �� � � �� � � � � �
� � � � � �� � � ���� � � �� � � � � � � �� � ��
� � ��
p Cttettttttt ttg.tgt tt
�tgtt�tttttt �tt ttt�t�ttttt ttg�tgt�gtt ggt �gtgttttttt �tgt��t tt ttg�tgt�tt � gt t tt
tgttgeg tt tttttg.tgt gt
� � �� � � � � � : :
��� �� � � � � � � � ��� � � � ��� ��� �
�� �� � � � � � � � � �� � � �� � ���� � � � �� � �� �
��� � ��� � �� �� � ���� � ��� � � � � � � �� �
� �� � � � ��� � � � � � � � � �� � � �� � �� �
Ctttettttgttet t t
� ���� ���� � � � �� ���� � � � � � � � � � �
��� � � � � � � � � � � � � � �� � � � � � � � �
���� � $ �� � � � �� � � � � � � � � ��� � � � � �
�� $ � � �� ��� �� � � � � � � �
:
: : :
: :
:
: : : : : :
�
:
: : : : : :
���� �� � ���
� � � � � � � � � � � � � �
Ct ttttttt ttg.tgt tt. ��� � � � � �� � �� � et ttttttt
ttg�t��ttt� �t�tttttttttg�tgt�tt�t�t�ttttttt�g�tt�tt��
1
����� ��� �� � �� � � � � � � � ��� �
�� �� � � �� � � gt��t�ttttg�tgt :
: tgttt.ttttg.tgt � � ��� �� ��� ��� �
� � � � � � � ���� � � � �
��� ������� ��� � � ������ ����� atggtett ��tgt�tt .tgetg tett.
� � � �� � � : : : : :
�� ��� � � � �� � � � � � � � � �� ��
� � � � � � � � � � � �
i ar e r � �� �� ���� � �� gg.tetetttttgt t t ttt tgttttt gtt
tgtt�t�tttt�tg�ttt�t��tt
i ar i N :
� �� � � � � � � � � � � ��� ���
�� � � ��� ��� � � � �� ��
� � �� �� ��� � � �� � ��� � �
� � � � �� � � � ��� �� � ��� �� � � � ��� ��� ��
� � � � ��� �� � ��� � � � ��� �� � ��� � �
� � � � �� ��� � �� � �� � � ��
� � � � � � � � ���
� � � � � � � � � �� � �
�� �� � � �� � � � � � � � ��� � � � �� � � �� �
�� � ��� ��� � ��� � � �� � � � � � � �� � a ar r
� r � �� � � a rr r � a r ar a rr r
r ea �� ar � �r � r a r ar �� � � � �r � r
.
: : : : :
� � � � � ��� �� � � �� � � �� ��� ��� � � �
� � �� ��� ��� �� � � � � � ��
e � �� �� � � � � � �� � � �� � � �
� �� � � � � � � �� � ��� � � � �� � � �
� � �� � � �� ��� � � � ��� �� � � � �
� � �� � � � � � � �� � � � � � � �� � � ���
2
� � � ��� �� � � � � � � ��� � � � �� �
��� �� � � � � � ���� � �� �
� � �� � � �� � � ��� � � �
��� ��� � � � � � �� � � � ��� � ��� � � � ��� �� �
�� � � �� � � � ��� � ��� ��� � ���� � � � �� � ���
� � ��
21
� � � � � � � � � �
�� � � � �� � ��� �� � � �� ���� � � � � �� � � �
� � �� � � � � � �� � ��� ��� � � � � �� �
� � � � � � � �� ������ �� � � ���� � ��� � � ���� �
�� � � � �� � � �� ���� � ��� � � � � � �
� � � � ����� �� � �� � ���� � �� � ��� ��� � � � ��� �� �
� � � � � � ����� � � ���� � � � � � �� � ��� �
�� � � �� � � � � �� �� � � � � �� �� ��
���� �� � �� � � � � �� � � � � � �� � � � � �
�� � � �� � � � �� � �� � � �� � �� � � �� � �
� � � � �� �� � � � � � � �� � ��� ���� � �� � � �� �
� � � � � � �� � � � � �� � � � � �� � �
�� � � � � � � � �� �� � � � � ����� � � � � �
� � �� �� � � ��� � � � � � ���� �� �
� a r � r �r ra r r r r r r � �� � � � � � � �
:
�� � � �� � � � � � n �� �� � � ��� ��
�� � �� � � � �� �� � � � �� � � �
�� � �� � �� � �� � �
� � �r � � r �ara �
@ �� � � � $ � �� � � � � � � �� �
��� @ �� � � � �� � � � � �� � �� � � �� �
� �� �� �� � � � �� � � �� � � � � ��� � �� �
� ���� �� � � � � � � � � �� � �
� �r � r rr rr r � · �� $ � �� ��
� �� � ��� �� � ��� � · �� � � $ �� �� � � �� � � �
· �� � � �� $ � � � � � � � � � � � � � ·
�� � $ � �� � � �� �� � � � �� � �� � ���� � �
� �r � rr r �
�� � � � �
� �r � a ra � r r � r r �rr
@ �� � � ���� @ �� � ��
� �r � r a r �rr
�� ����� @ �� � �� ��
� � � �� �� � � �
� �r � er r r r r r
:
� �r � r e a �r er r a
:
�� � � � � �
� �r � r � � rar r a�r�rr r r
�� � ��
� �r � aa � r rr r r r r
�� ��
� � � ���� � �� �� �
r �rr ar @ �� � � � �� � �� � �� � ��� � �� � � ��
�� ��� � ��@ �� ��
��� � � � � �� @ �� �� �� � � �� �
� r r �a ae ra �r� arr r
�� � � � � � �
:
�� � � �� � �� ��� ��� � ��
: : �
p
22
� �r � rr r � @ �� ��� � @ �� � � �� ��
� �r � a ra � r r � r r �rr @ �� � �� � �
�� � �� @ �� � � �� @ �� � � �� � �
r a r �rr * �� � � ����
�� � �� �� @ �� � �� �� @ �� � � ���
� � � �� �� � � �
� �r � er r r r r r @ �� � ��� �� � � ���
� �r � r e a �r er r a �� � � �� � ��� �
: :
� �r � r � � rar r a�r�rr r r @ �� � � �
� �r � aa � r rr r r r r @ �� � � � �� �
� � �� �� � �� �� � � � � r �
� �� � �� � �� � ��� � �� � � ��
�� �� � �� � �
�� �� �� � � �� ��� � � ��� � � � r � a
r �a ae ra �r� arr r � �� � � � @ �� � ��
�� � � � � � �
: ����� � �� � �� � � � �
� ��� ��� � ��
�
p ��
�� � � �� �� @
�� � �� � �
�� � � �� � �
�� � � ���� @ �� �
�� � � ��� @ ��
� �� � � ��� @ �� �
�� � � �� � ��� �
:
�� � � � @
�� � � � �� � @
r � r
� �� � �� � �� � ��� � �� � � ��
��
r � a
�� � ��� @
����� � �� � �� � � � �
�� � � �
23
� � � � � �� � � � � � � � @ r a rr
ai r ra r ar � � � � � � �� � � �� �� �
� � �� � �� � � �� � � ���� �� �� � � �� � �� � ��� � � ���
� r a rr rr � ra �r �� �� � � �� � � � �� � �� ��
�� � � � � � � � � ��� � � �� � @
r a rr rr aaa r r rar � �r � rr ar : : :
� � � �� � � � � � � �� @ r a rr rr ��
raaa� a ar r ar ar ar� � � ��� � � � � �� � � � �
� � � � � �� � ��� ��
� � � � � � � �� � �� � � �� �� �� � �� � � ��
� � � � � @ r �rr r r r �ara � :
� � �� �� � �� � � � � � � � �� � �� � �� ��� � � ��
����� � ��� @ r �rr r r a � � � � �� � �� �� � � ��
��� � � ��� �� �� �� � � � � � ����� � � �� � ���
� @ a r �r r r � � � �� � �� � �� � � � � �
r r r r a � � � ��� � � � � �� � � ����
�� � � � � � �� � * a e rai r
et;tet ttttt ttgettt tt; gg�tgttttt �tt ttg�tttttt gtttg����tgttt�t �t a e
� �r � �g�t�t�t�tt�t�gttttt��g��tt�gt � �gttt�ttttt�� �� � @ a e
a rr ��� � a r �ra� � a e a ra ar** a
aa r � � a iara r r a e ��� ��� � ��� @
a r r �r r � � a a � � a r � �
2
1 :
� � � � � � � � � ��� ���� � �� � � � �� � �� ��� � � � � �
� � � � �� ��� ���� � �� � � �� � �� � �� �
:
� � �� � ��� � � � �� � � � � �� �� � � ��
� � � � � 1� � � � � ��� �� � �� � 11 � ��
��� �� � 1� � � �� � �� � � �� � ���
� � �� � � �� ��� �� �� ��
� � � ��� � �� �� � � �� � � � � � � � � �
��� � �� � �� � �� � � � ��� � �� �� �� � �� ����
� � � � �� � �� � � �� ���� � � � � � � � ���
� �� � � �� � � � � � � �� � � � � � �� � � � � � ��
:
� � � � � � � � �� � r � a � r r � � ��
� �� ��� � � � � � ��� � � � �� �� � � �
r r : ��� � � � �� � �� � � � � � ���� �
: ���� � ��� � � ��� �� � � �
�� ���� � � ��� �� � �� �� � raer a r � rra e �� � �� �
: : aa r a l ra :
� � � �� � � �� � � ��� � � �� � ���� � �� � r � r �
a r r �� � �� � �� � �� � � � �� �� ��� � �� � �
��� � � � � � � �
:
� � � � ��� � � �� � �� �� � � � �� � � �
� �� �� ��� � � � � � � �� � �� � � � ��� � �� �
� �� � � � � � �� � � � � � � ��� � � � � � � � �
��� � � � � � � � � � � �� � � �� � � �� � � � � �
� � � � � �� � � � �� � � �� � � �� � � � �� � ��
� � �� � � � �� �� � � � � � � � � � �
2
� � � �� � � � � � � �� � � � �� � �
� � � � � � � � ��� �� �� �� � � � � � �� � � � ��
��� � � ��� � � � � � �� � � � � � �� �
��� � � � �� � ��� � �
� �� �� ���� � � � aar r a r ��
� � � � � � � � � �� ��� � � � �� � � � � � � �� �
N gtttt�tggt���t gtttttgt���t �tt ttg�g�tttt
���� � � � � ��� � � � aar r r � � � � ��� � �
� � � �� � � �� � � � � � � � �� �� � � �� ��� �
� �� � � � � �� � �� � � �� � � � �� � � �� ���
�� � � �
�gt�t��t :
� � � � �� � � � � � ���� � � � � � � � � � � ��
: tg�gt�t��.t
� �� � � � � � � � � ��� �� � � � �
� �� � � �� �
�� � � � ��� � � � � �� � � � � � �
� � �� � �� ��� � � � � � � �
� � � � � � � � �� � * :
��� � � ��� ��� � � ��� @ � � � �
� � � � � � � � � ��� � � � �� ��� �
� � � �� ��� � � �� ��� ��� � � �� ��� @ � � � � � �
��� � � �� ��� � � �� � ��� �
� � ��� ��� � � � � ��� ��� � � � �� � � � � �� �
���� � �� � � � � � � � � � � � �� � � � �� � � �� � � �
� � � � � � � � � � � � � � � � �� � � � ��
aar r r ���� � � � ��� � � � � ��
� ��� � � � � ��� �� � � � � � aar r r a �
a �� � � � � � �� � �� �� �� � � �� � � ��� � � �� �
2
� � � � �� � �� � � �� � � � � � � � � ��� � � �
� � �� � � � � �� �� ��� � � � � ��� � � � �
�� � � � � � � � � � ��� � � �� �
� � � � � @ ��� � � � � � � �� �� � �
� �� � � � �� @ ��� � � � � � � �� � ��
��� � � ��� � �� �� � @ ��� � � � � � �
� �� � � �� �� � � �� � � � �� ��� � �
:
: :
� � � � � � � � �� � � � � � � � � � � � �
��� � � � ��� � � �� ��� � � �� � �� ��� � �
�� ��� ��� � � � �� � ��� � � �� � � � � � ��� �
��� � �� � � � � � ���� ��� � �� �
� � ������ ��� � � �� � � � � �� � ��� � ��� � � �
�� �� � � � � � �� � ��� � � � � �� � � � � � �� � � �
� � � � � � � �� � � � � ��� � � ����� � �� �� � � � � ��
� � ���� � � � �� � � � �� � � � �� � ����
� � � � � �� � ��� � � �� � � � � ��� � � � � �
��� � � � � ��� � � � ���� � � � � � �
� �� � � �� ��� ��� ����� � � � �� � � � � ��� � � �
� � �� � ��� � �� � � �� � � � � � � ���
� � � � � � � � � � � � � � �
��� �� @ � �� � � � � � � � � � ��� � � @
� � � � � � � � � � � � � �� �� �� � � � � � � �� �� ��
� ���� �� ��� � � ��� � � @ � � � �� � �� � ��
���� ��� � ��� � � �� � � � � �� � �� � ��
� � � �� � � � � �� � �� � � � @ � � � � � � � �� �� � �
� � � � � � �� � �� � �� � � ��� � � �
�� � � �� � �� � � � @ � � � ��� � ��� � �� � � � �
� � � � � �� � � � �� � ��� @ ��� � ���� � ���
� � � � �� � � � � � � � � ��� � � � � � �� �
2
� �� �� � � � � � � � � � � �� � ��� � � �� � ��
� � � � � � � � � �� � � � @ ��� � � � �� �� �
� � � �� � �� @ � � � � � ��� � � �� �
��� � � � � � � � ��� � � � � �� � ��� @ � � � � �� �
�� � �� �� � � � � � �� � �� � � � � �� � ��� �
��� � ��� � �� � � � ��� � � �� �� � �� �� � ��
� � � ��� � � �� � � � � � �
� � � � �� * � �r � aa r ra �� :
��� � � ��� ��� � � ��� ��� � �� � ��� @ r � r
e aer � � ��� � ��� ��� ��� � � � ��� ��� � � � �� �
��� � � � ��� �t r � rr � � ra r �
�t r �
� ra �� ��� � � � �� � � �� � � � � ���
��� � � � �� � � �� � � �� � � � �� � � � ����
��� � � � �� � � �� � � �t r � r a r r �r
� � � � ��� � � � �� �� � � � � �� �� � ��� ���
� � ��� �� � � � �� � �� � � � ��� � � � � � � � �
�� � � � � ���� � �� � � � �� ��� ��� � � �� �
�� � �� � �� � ��� �� � � � �t r � � r r � a
��� � �� �� � � � � � ���� � � � ��� � �� �� � � � � � �
: : �t r � �r ra r r r rr r r �
ra ��� � � � � ��� � � � � � ��� � � � @
r � a ar� ra � r � � � �r � e r � � ar
����� � ��� � ��� �� � � �� � � � @ � � � � �
�� � � � ��� ��� ��� � ��� � �� ��� � �
� ��� � � �� �� � � � � � �� �� � � � �
�� � � � � � � ��� �t r � r ar r a a ar ra r
��� � �� ��� � � �� ��� � � � ��� �
� �� � ��� � � �
2
� � � � � �
�� � ��� ��� � � � ���� �� � � � � � � � ��
� ���� � ��� � ����� � � ��� � � � � � �� � � �
�� � � �� � �� � � �� � � ��
�� � � � � � � ���� � � � � � � � � � �
� �� � � �� � � �� ��� �� � � � � ��� � � � �
� � � � � � � � � � � à � � � � �
�� � �
� �� � � � ��� � � ��� � � � �� �� � � � ��
� � � � � � � � � �� � � �� � � �� � � � �
� � � �� � �� � � � � �� � � � � � � � � � �
��� �� � �� �� � � � � � � � � ��� � ��� �
���� � � � � � �� � �� � � � � � �
�� �� � ��� �� � �� � � � � � � �� � � �� � �
� � � �� � � � � � � � � � � � � � �
�� � � � � � � � � �� � ��
�� � � � � � � ��� � � � � � � �� � � ��
� �� � �� � �� � � � �� � �� � � ��� � � �� � ��� ��
� � � �� � ��� �� � � � �
�� � �� � �� � � � � � � �� � � �
� � � � � �
� � � � � �� � �� � � �� �� � ��� � ���� � �
� � �� � � ��� � � � �� � � � �� � � � � :
� � ��� �� � � � ��� � � �� � ��� � � � � � � � � ��� � � � ���
� � � �� � � �� � � � � � � � � �
�� � � � � �� � � � �� ��� � � � � e
� �� � � � � � � � ��� � � � � �
� � � �� � � � �� � �� � � � � �� � � � �
�� �� � ��� � � � � ��� �
2
� �� � �� � � � � � � � � � � ��� �� �
� ��� � � �� �� �� � �� �� � � �� � � �� � � � �
� � �� � � � � � � �� � � � � � �
: : :
�� � � � � � � � � � �� �� � �� �� � � � � �
� � � ���� �� � � �� � � � � � � �� ��� � �� � � � �
� � �
� � ��� �� � � ��� � � �� � � � ��
� �� � � �� � � �� � ���� �� ��� � � � � ��� � � ����
��<�< < < < � � ��
� �� � � ��� � � � ��� � � �� �
� ������ ����� �� ������������� !� ����� ���� ����� ������"
�� �� � � � � � �� � �� � �� � � ��� ��� �� �
� �� � � � � � � �� � �� � �� � � ��� ��� �� �
� �� �� � � � � �� �� � � � � � � � � �� � � ��� ���
: :
� �� �� � �� � �� � �� � � ��� ��� �� �
� �� �� � � � � �� � � � � � � ��� � � ��� ���
: :
�� � � � ��� � � �� � �� �� �� � � � � � � � �
� � � �� � � �� � ��� �� � �� � �� ��
�� � � �� � �� � � �� � � � � �� � ��� � � ��
�� � � �� � � �� � � � � �� � � � �� � � ��� � �� � �
�� � �� � � �� � � � � � � �� � �� � �� �
� � � � � � �� � � � � � � ���
���� � � � � ���� � � � � � ��� � �
� � � � � �� ���� � �� � � �� � � �� � ��
� � � � � ���� � �� � � �� � � � � � � ���
� � � � �� � � � �� �� �� � � ��� � � � �� � � � � � $
: :
� � � � ��� � � �� � ��� � � �� � � � �� � � �
� � �� � �� � < ����� $ �����
3
� � � � � � � ��� � � �
� � ���� � �� � � �� � � � � � $ �� � � ��
����� � � � �� � � � � �� � � �� � � � � �� � � �
� �� � � $ � � � � � � ��� � � � � � � ��
� � � � ��� �� � �� gtttt.tetggtggttttt gtgettt gt
gtgettttgtg.tetggtggttt.
�� � � � � �� �� � � � �� � � � � ��� ��
� � � � � �� � � � � � �� � � �� � � � � � � �
��� � � � � � ����� �� ��� � � � � � �� ��� @
�� � � � � � �� � �� � ��� ���� � � �� � � � � �
� � � � � � � � � � � � � � �� � � � � ��� � � ��� @
�� � � � �� � � � �� � � � � �� �� � ��
@ � � �� � �� � � ��� �� � � � �� ���� � � � �� �
: :
31
� � � � � � � � � � �
#$�� ���% ttgtgggtgt�ttttttgg�tt�� � � ��� � � � � � �� � ����� � � �
� � �� � � � � � � � � � � � � � � � � � � � � ��
� � �� � � � � � � � �� � � � � � �� � �� �� � ��� � � ���� ��
� � � � ��� � �� � �� �� � � � �� � � � � �
�� �� � � � � � �� � �� � � � �� � �� ��� � � � � � � ��
� � � � � � � � � � ��� � � � � � � � � � � � �
�� ��� ���� �� �� � � �� � � � �� �� � � � � � ��
�� � ��� � � � ���� � �� � � � � �� �� �
: e
e y � � � � �� � ��� � � � �� ��
� � � � �� �� � � � � � �� �� � � � � �� � �� �
� � �� � � � � � �� � � � �� � � � � �� ��
� � � � �� � � � � �� �� � � � �� ��� � �� �
� �� �� � � � � �� �� �� �� � �� � � � � �� �
� � �� � � � � � �� � � � � � � ��� � � �
� � � � � � �� � � � � � � � � � � � � � � ��
� � � �� � �� � �� � �
� �� �� � � � �� �� � � � � � �� �� � � � � � � �
� � ��� � � � � � ���� � � � � � � � � � �
� � � � � � �� � �� � � � � � � � � � � � � � � � �
� � � � � � � � ���� � �� �� � � � ���� �
� � � �� � �� � � � � � � � � �� � �� � � � �
� � � �� � � � 1� � � � ��
r rr ar ar r � � � � � � � � � � � �
���� � � �� �� � � ��� � � � ���� � � �� ����
r ar ar �� � � � � � � � � �� � � �
32
�� �� � � � � � � �� � � �� � � �� � �� �� � � �
� ��� � � � � �� �� � � � � � ��� � �� �� � �
� � � ��� ���� �� � � �� � � � �
r r a rr ar� � � � � �� � � �
��� � � � �� � �� � � � � �� � � �� � �� �� � � �
� �� � � � � �� � � �� ���� �� � � � � � �� � �� � �� �� � �
�r �a a r arr � � � � � � ��� � � � � � �
�� �� � ��� � � ���
� � � � � �� ��� � � � �� ���� � ���
� �� � � � � � � � �� � � ��� � �� � � �� � �
�� � � � �� �� �� � � � � � � �� � �� � � ��
� � � � � �� �� �
� � � � � � � � � � �� �� ��� � � �
� � � �� � � � �� � � � �� � � � � � � � �
� � � � � � �� � � � � � � �
� � � �� �� � � � � � � � � � � � � � �
�� � � � � ��� �� �� � ��� � �� � � �� �� � � �� � ��� � � �� �
� � � � � � � � �� � � � �� ��
� � � � � � �� �� � � � � � �� � �
�� � � � � � � �� � �� ��� � � � ��
� � � � � �� �� � �� � ��
�� � � �� � � � � � � ��� � � � �
�� � � ��� �� � ��� � �� � �� � � � � � �
� � � ���� �� � � � � �� � � ��� � � � �� � �
� � � � �� �� � �� � � � � :
� � �� � � ��� � � �� ��� �� �� �� � � � � �� ��
� � �� � � � � � � � ���� �� �� �
�� �� � � � � � � �� ��� � � � � � � �� � � � �
� � � � � �� � �� � � �� � � �� �� � � � � � �
� � � �� �� � � � � � ��� � � � ��� � � �
33
�� �� � � � � �� � � �� � � � � � � � �� �
� �� � � �� �� � � � � � �� � �� � � � � � ���� �
� � �� � �� �� � � � � � � ��� � ���� �
: � � � �
� �� �� � � �� �� � � � � � �� � � ��
: : : &�� n
� � � � � � � � � � ��
� � � � � � �� � � � � � � � � �
� � � � � �� � � �� � � � �� � �� � � �
���� � � ��� � � � � ��� � �� � � � � � �
� � � � � � � � �� � � �� � � ��
� � � � � �� � �� � � � � � � � � � � � �� �
� � � �� �� � � � � � �� � �� � � � � � � � � � � ��
�� � �� � � � �
� � � � � � � �� �� �� ��
� �� �� � � � � � � � � �� � � � �� �1�
� � � * � � � �* � � � � � �
� � � � � � � � �� � � � �� � �� � ����
� �� � � � �� � � � ��� � � � �� � � � �� � � � �� �
�� � �� � � � � � � � �� � � � ��� � �� � �
�� � �� � � �� � � � � �� �� � � � � � ��� � � � � � � �
�� � � � � � � �� � �� � ���� � � � ��
�� � �� � �� �� �� � � � � � �� �� � �� � � � �
� � � � � �� � ��� �� � �� �� �� � �� � ��
�� � �
� � � ��� ��� � �� ��� � � ��� � � ��� �
� �� ��� �� � � �� � � � � � �� � � � � � �
: :
� � � � � � � �� � �� � � � � � � � ����
� �� � � � � � � � � ��� � � � �� � � ��� ���
e � � �� � � � � �� � �
� � � �� � � � � ����� � � � � ��� �� � �� � � ��
3
� � � � � � � � �� � � � � � �
� � � � � �� � � � � � � �� � �� � ��� � � � �
� �� � � � � � � � � �� � � � ��� �� �
� � � �� � ���� � ��� � � � � � �� � � �� � ��
t � �� � � �� �� � � � �� �
� � � � �� � � � � � � � � � � � �� �
� � � �� � � � ���� ��� ��� � � ��� � � � � � �
:
� � � � � � � ��� � �
� ��� � � � � � � �� �� �� ��� �� � �
� � �� � �� �� � � � � � � � ��� � � � � ��� �
�� � � � � �� �� � � � ��� � � � �
� ��� � � � � � � � � �� �� � � � � �� � � �� ��� ��
� � � � � � � � �
� � ��� � � �� � � � �� �� �
� � � � �� � � � � � � � ��� �� � �
� � ��� �� � �� � �� � � � �� �� � � �
� � � � � �� ��� � � � � � ���� � � � � � � �� � ����
��� � � �� �� ��� � ���� � ��� �� �
� � �� � � � �� � � � � ��� �� �
� � � � � � � � �� � � � �� �� : :
�� � � � � � � � � ��� � � ��� � � � �� �
� � � � � � �� �� � �� � � � � � � � ��
� � �� � � � � � � � �
� ��� �� � � � � � � �
�� � �� � � � � � � � � � �� � � � � �� ��� � � ��
���� � � � � �� � �� � ��� ��� � �� � � �
�� � � � � � � � � � � � � �� �� � � � �
�� � �� � � �� � �� � � �� � ��� � � � �� � � �
� � � �
3
� � � � � � �� �� ��
�� � � � � � � � � � � � � �� � � � � � � � �
�� �� � � � � � � � � � ���� � � � � � � � �� � � � � �
� �
� �� � � � � � � � ��
� � �� � � ��� � � � � � �� � � �� �� � �
� � �� � ��� �� � � � � � � �� � � � � � � ��
��� �� �� � � � � � � � � �� � � � �� � � � �
� �� � � � � � � � �� � �� �� �� �
� � � � � � �� � � �� � � � ��� � � �
� � � ��� � � � �� � �� � �
� �� � � � � � � � �� �� � � � ��
� � �� � � �� � �� ����� � � � � �� � � �� �
�� �� � � � � � ��� �� � � � �� � � �� �
� ��� � ����� � ���
� �� � � � �� � n � �� ��
� ��� � � � �� � ��� � � � ��� � � ��� �
� �� � � � � � � � � �� � � �� � � ��
�� ��� � ��� �� � � �� � � � � � �� � �� �� � ��
� ��� � �� � � � � � ��
� � � � � � �� � � � � � � �� � �
� � �� � � ��� � �� � ��� � � � �� �� � � � � � � �
� � � � � �� � � � ��� � � ���� � � � �
�� � � � � � � ��� � � � � � �� � � �
� � � � � � � � � � � � � �� � �� �� � � �� � ��
� �� � � � � � � � � � � � � � � � �� � � � �
�� � � �� �� � � � � ����� � ��� ��� ��� � �� �� � �
��� � � � ���� � � �� � � � � � ��� � � � � �
� � � �
� � � � � � � � � � �� � � � �
� � � � � � � �� � � � � � � ��� � � �� �
�� $ �� � � � � � �� � �� ���� � � � � � �
3
��� � � � � � �� � � � �� �� ���� � � �� ��
�� � � �� �� � ���� � � �� �� � ���� � �
� � � � � � � � ��� � � �� � � �� � �
� � � � � � � ��� �� � � � � � � � �
�� ��� �� � � � � �� � ��� �
� � � � � � � �� � �� � � � �� � � �
� � ��� � � � � � � � � � � � � � � � �� �
: