please solve it ASAP

Problem 3 A desired product D is produced from the elementary reaction of A and B in the luedid pone (Reaction \#1), but a side elementary reaction also occurs for undevirod protact E Presoun in If the reactions are performed isothermally in a PFR that can operate at any temperwase berwow 75 and 510C a) Indicate and explain in detail at what temperature should the reaction be periosmol w maximize the selectivity of D? (3.5%)