A closed-loop transfer function is given by

(a) Obtain the response of the closed-loop transfer function T(s) = Y(s)/R(s) to a unit step input. What is the settling time Ts (use a 2% criterion) and percent overshoot P.O.?
(b) Neglecting the real pole at s = -7, determine the settling time Ts and percent overshoot P.O.. Compare the results with the actual system response in part (a). What conclusions can be made regarding neglecting the pole?

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Y(s) 77(s 2) 1 (s) = R(s)= (s+ 7)(2 + 4s + 22)