2.1. Consider the heat exchanger represented by the figure below: Where: w= liquid flow rate ws= steam flow rate T1= Inlet liquid temperature T2= Outlet liquid temperature (a). Identify the control objectives of the heat exchanger. Also identify the manipulated variables and the disturbances. [4] (b). Construct a feedback control mechanism for the above heat exchanger. [4] (c). Construct a feedforward control mechanism for the above heat exchanger. [4] (d). List 2 advantages and 2 disadvantages of both feedback and feedforward mechanism. [8]