First order closed loop system a b R s E s 1 TS Derive closed loop transfer function Apply a unit step input to the system 7 Marks 63 2 N 86 5 The output response y t of the system is shown in Figure 8 Proof the y t response by using inverse Laplace transform y t 95 98 2 99 3 Y s 0 2T 3T 4t 5t Figure 8