Consider the second-order control system represented by the following closed-loop transfer function Y(s) 8 = R(s) s²+4s+8 if the input r(t) is shown in Fig.1, find the value of t₁ and A such that the response does not exhibit any oscillations and y(t) = 1 for t ≥ t1. The output is shown in Fig2 r(t)↑ y(t) 1 1 A t t1 Fig.1 A t1 Fig.2 t