A process that can be modeled as a time delay (gain=1)is controlled using a proportional feedback controller. The control valve and measurement device have negligible dynam-ics and steady-state gains of Kᵥ=0.5 and Kₘ=1, respectively.After a small set-point change is made, a sustained oscillation occurs, which has a period of 10 min.(a)What controller gain is being used? Explain.(b)How large is the time delay?

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