Consider the folbwing system:

s] Find the value of k such that the damping ratio 3 of the cbse-bop system is 0.5. ) [10 points] Obtain the rise time Tr, peak time Tp, and the maximum overshoot Mp in the unit-step response. s] Determine the settling time Ts. ts] Propose a way to improve (decrease) the settling time of the close-bop system.