A system is represented by the block diagram shown below. C(s) (a) Calculate the transfer function using block diagram reduction techniques. You must R(S) show the reduction process step by step (b) Draw the signal flow graph (SFG) for the block diagram and calculate the transfer function using Mason's formula (show all the various components of the formula) C(s) R(S) R(s) + G H G4 H H G G3 C(s)