3. Consider the following second-order system 1 G(s): = (s+1)(s+2) Suppose that P control is used for this system. Determine the value of Ke such that the system exhibits an oscillatory response to a step set-point change (yset = 1/s). Will this system exhibit offset? 4. Calculate the offset to a step set-point change (yset = 1/s) due to P-only control for the following process: Sketch the response for Kc = 1. 1 G(s) = s(3s+1)