�

2

in

3

in

4

in

�

�

�

�

2

1

s

2

2 1F

3 4

s

s

s s s

��

� �

1

12

1

8

1

24

R

L

L

R

�

1

3

1

3

1

2

1

2

Av

zz

z z

� ��� �� � � �

�

�

�

�

�

H

�

�

EJ

t

�� �

� ��

�

B

t

��

��

J

�E

�

B

�

�

�

�

�

�

�

�