4.11. A stirred-tank chemical reactor is shown in Figure Q14.11 with the following reaction. ABHrxn=0rA=k0eE/RT1+kCxCA The available sensors and control valves are shown in the figure, and no changes to these are allowed. The goal is to control the reactor concentration of A tightly by single-loop or cascade control, whichever is better. For each of the following disturbances, design the best control system and explain your design: (a) the heating medium pressure (P1),(b) the solvent feed temperature (Ts),(c) the reactant feed pressure (P2), and (d) the inhibitor concentration (Cx) which enters in the solvent. (To assist in the analysis, prepare a block diagram for each case showing the appropriate single-loop or cascade control system.) FIGURE Q14.11