Consider a unit operation in which a hot process fluid is cooled with cooling water. The cooling water to the heat exchanger is to be supplied by a pump. The control system measures the process fluid outlet temperature and manipulates the flow of cooling water to the heat exchanger to maintain the process fluid outlet temperature at a constant set value. a) Provide brief explanations, with accompanying process control diagrams for three separate ways (with one to be feedback control loop only, one to be feedforward control loop only and one with both are using together) how this might be done, identifying the measured variable and what item of hardware is being manipulated in each case; b) Sketch the conceptual control diagram of the above system when both control loops are using together and clearly indicate the name of each process and control element