can you solve b, c, and d?

A two-tank system is shown below. The areas of the tanks are A1=1m2 and A2=2.5m2, respectively. The valve constants are 1=0.25m2/min, and 2=0.5m2/min. The operating conditions are Fi=1m3/min, and Fd=2m3/min a. What are the manipulated variable, disturbance and controlled variable? b. Develop the dynamic model for the tanks. Find the relevant transfer functions. c. A P-only level controller is connected to the second tank. The range for all of the electronic signals is 0% to 100%. Measuring device has negligible dynamics and a range of 0 to 10m. Valve dynamics can be described by a first-order transfer function with a time constant of 0.1 min. A 100% change in the signal to the control valve produces a 2m3/s change in Fi. Construct the block diagram of the closed-loop process showing the transfer functions and input and output variables with their units. d. Find the regulatory closed-loop transfer function. Find the admissible values of Kc for reasonable control action