R1S3 



R1-I3-F8 



S5 



Rl 



Rl 



S 



S 



R3 



S3 



Rl 



R1-I4-F8 



Rl-I2-F17b 

 R1-I3-F12 



Rl-I2-F31b 



Rl 



R3-I7-F20 



Rl 

 Rl-Il-F14b 



S 

 Rl 



