4. (25 points) For the unity-feedback system of Figure P7.1 in the text problems, where G(s) = s(s + 4)(s + 8)(s + 10) find the minimum possible steady-state position error if a unit ramp is applied. What places the constraint upon the error? R(s) +E(s) _…G.? .1.- G(s) C(s)
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