For a first order system with a transfer function of (1/3s + 1), given a unit step input, please (a) derive the transfer function of this system with a Proportional control (Kp) with a feedback loop. Draw the system response for Kp = 1,2,3,4). (b) derive the transfer function of this system with a Proportional control Kp and an integral control Kl with a feedback loop. Draw the system response for Kp = 1,2,3,4; and Kl = 0.1,0.3,0.5,1.0). You may generate four figures, each with a different Kp and overlaid Kls.