Question: ( 1 0 points ) The open - loop transfer function of a unity feedback system is given by G ( s ) = (

(10 points) The open-loop transfer function of a unity feedback system is given by G(s)=(K)/(s(1+0.1s)(1+0.5s)). Find the
gain margin when (a) K=5; (b) K=20. In each case, estimate the PM and comment on the stability of the closed-loop system.
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( 1 0 points ) The open - loop transfer function

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