e 5 1. For a process with G(s)= -35 you are going to use a Pl controller with ti 10 s +1 = 10. (a) Determine what Ke will result in a gain margin of 2.5. Do so without iterating. Hints: If GM=2.5, what should be the ||GOL(ico)||? Consider factoring ||GOL(ico)|| = |KC| || GOLW|kc|(ico)||, the trick we used to not need iterations for finding Kul for Ziegler-Nichols tuning (b) Without a new Bode plot determine what value Kc would decrease the gain margin to 2.2 (no change in t;=10)