Figure P10.3 shows a general closed-loop control system. The plant transfer function is G_{p}(s)=\frac{1}{s^{2}+6 s+8} a. Determine whether the closed-loop system is stable for control gain K, 2. b. Compute

the controller gain Kp so that step response shows 25% overshoot. c. Estimate the settling time for a step reference input if the control gain is K, 0.5.