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I have done first part but don't know how to solve second part.Please help me.

The open loop transfer function of a unity feedback system is G(s)=50k/s(s+10)(s+5)(s+1) (I)Determine gain and phase margin (ii)The value of steady state error coefficient for a gain of 10 dB...

A servo system for the position control of a rotable mass is stabilized by
viscous friction damping which is three-quarters of that is needed for critical
damping. The undamped natural...