Please I need a complete solution for Problem 2.28.

2.28 Consider the closed-loop system of Problem 2.26(a). (a) Find the impulse response of the closed-loop transfer function, and obtain the impulse response sequence for a sampled system output. (b) Obtain the z-transfer function by z-transforming the impulse response sequence. (c) Using MATLAB, obtain the frequency response plots for sampling frequencies wg = kw), k=5, 35, 70. (d) Comment on the choices of sampling periods of part (c). (including problem 2.26a for reference) 2.26 The following open-loop systems are to be digitally feedback-controlled. Select a suitable sampling period for each if the closed-loop system is to be designed for the given specifications. 1 (a) Go(s) Time constant = 0.1 s s +3