Question: reference inputs of the system for P, PD, and PID controller. Let = 19, = 0.5, and = 4 19 . b. Determine the system

reference inputs of the system for P, PD, and PID controller. Let = 19, = 0.5, and = 4 19 . b. Determine the system type and error constant of the system with respect to disturbance inputs for each of the three regulators in part (a) with respect to rejecting polynomial disturbances () at the input to the plant. c. Is this system better at tracking references or rejecting disturbances? Explain briefly. d. Verify our results for parts (a) and (b) using MATLAB by plotting unit-step and ramp responses for both tracking and disturbance rejection

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