A continuous-time unity-gain (tracking) feedback system has a forward-path transfer function with exactly one pole at the origin of the s-plane. (a) Describe in as much detail as possible the steady-state error signal in response to a step excitation. (b) Describe in as much detail as possible the steady-state error signal in response to a ramp excitation. The transfer function of a continuous-time system has one finite pole in the open left half-plane at s =  s  0   and no finite zeros. If you wanted to make its response to a step excitation approach its final value faster, how would you change  s0  ?