P9.24 A closed-loop system with unity feedback has a loop transfer function

K(s + 30) L(s) = Ge(s)G(s) = (a) Determine the gain K so that the phase margin is P.M. =35. (b) For the gain K selected in part (a) de- termine the gain margin of the system. (c) Predict the bandwidth of the closed-loop system.