B is the desired product, and X and Y are foul pollutants that are expensive to get rid of. The specific reaction rates are at 27C. The reaction system is to be operated at 27C and 4 atm. Pure A enters the system at a volumetric flow rate of 10 dm3/min.

(a) Sketch the instantaneous selectivities (SBAoSB/Y, and SBXY-ry(rxtrY)) as a function of the concentration of CA
(b) Consider a series of reactors. What should be the volume of the first reactor?