Figure 01.1 Figure Q1.2 (a) Figure Q1.1 shows Bode plot of the open-loop part of a unity negative feedback control system shown in Figure Q1.2, where K=1. Determine the gain and phase margins for this system, and explain what their values imply for the behaviour of the closed-loop system. Use a sketch to show how you obtained the values from the plot. (b) If a simple proportional controller is adequate for this system in closed-loop, to what value the controller gain K should be changed in order to give the closed-loop system a phase margin of 60 ? What will the new gain margin be