In PART C I'm stuck ....

I need to find the Trafer funtion for H(s) -> For all the system

C)

H 'sub1' (s) =(1/(1+src))

H 'sub2' (s) =((sL)/(sL+r))

H(s) = ???

d1) ???

d2) ???

Any help will be appreciated ...

http://img186.imageshack.us/img186/6782/exx.th.jpg

http://img195.imageshack.us/img195/3793/exx1.th.jpg