11 



i 



J 



k 



1 



7. 

 b 

 c 

 d 



e 

 f 



g 



Rl-Il-Fl 

 Rl 



R1-I2-F2 

 Rl 



R1-I1-F3 



Rl 



R1-I2-F4 



Rl 



Rl 



R2 

 Rl 

 Rl 

 Rl 



R3 

 Rl 

 Rl 

 Rl 

 Rl 



9. 



b 

 c 

 d 



e 



R2-I2-F5 



R1-I3-F6 



R1-I1-F5 



Rl 



R2-I1-F2 



10. 

 b 

 c 

 d 



e 



Rl 



Rl 

 Rl 

 Rl 



11. 

 b 

 c 

 d 



e 

 f 



g 



h 

 i 



J 



1 



12, 



Rl 

 Rl 

 Rl 

 Rl 

 Rl 



R1-I3-F7 



Rl 



Rl 



Rl 



Rl-Il-Fl 



Rl 



R1-I2-F3 



Rl 



Rl 



Rl 

 Rl 



Rl 

 R1-I6-F22 



R1-I2-F10 



Rl 



