Q5. Consider the control system whose block diagram is shown in figure below: P U Ge a. Y. Gm a) First show that when Ge(s) =Kc, Gy(s) = 1, G = 1, 5 and Gp(S)= 2s+1; the closed loop system is stable for all values of Kc>0. b) IfGme, find the range of K, values for which the closed loop is stable. Compare this with the results of part (a). Comment on the effect of time delay on stability. Use 1/1 Pade approximation. c) Assume that Ge(s) = K(1+0.2s) for the system in (b). Find the new range of K. values required for closed loop stability and compare this with the results in part (b). Comment on the effect of PD controller on stability.