15 Consider a control system with unity feedback as in Figure 9 69 with loop transfer function L(s) G(s)G(s) (s 4) s(s 1)(s 5) The gain and phase margin are a G M dB, P M 58 1 b G M 20 4 dB, P M 47 3 c G M 6 6 dB, P M 60 4 d Closed loop system is unstable

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15  Consider a control system with unity feedback as in Figure 9 69 with loop transfer function L(s)   G(s)G(s)   (s 4) s(s 1)(s 5) The gain and phase margin are  a  G M    dB, P M    58 1 b  G M    20 4 dB, P M    47 3 c  G M    6 6 dB, P M    60 4 d  Closed loop system is unstable

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Question: 15. Consider a control system with unity feedback as in Figure 9.69 with loop transfer function L(s) = G(s)G(s) = (s+4) s(s+1)(s+5) The gain and

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