Problem #1: Find the closed-loop system, by applying the unity feedback system below. N(s) (s) D(s) 60(s+3)(s + 4)(s + 8) s2(s+6)(s+17) Then find the steady-state error with an input of R(s) = 80t²u(t)? Problem #2: Determine a value of K with an input of R(s) = 100tu(t), where the steady-state error is equal to 0.01? R(s) K C(s) s(s+2) 5s K