please help me only with question d.

Question 4 Reactant A enters the reactor at volumetric flow rate of 10 dm /min. The system is operated at 27 C and 4 atm. Reactant A decomposes by three simultaneous reactions to form three products in three gas-phase reactions shown below A- Reaction 1 AB Reaction 2 ARY Reaction 3 B is the desired product and the gas constant is 0.082 dm.atm/K.mol. The reaction rate and activation energy are shown in Table 05 Table Q5: Reaction rate and activation energy Reaction Rate law Rate constants 7x - k. k=0.004 (mol/dmmin 2 to-k.C. k=0.3 min 3 ryk ha=0.25 dm'/mol.min 1 6 a Prove the maximum concentration expression below. b (7 marks) Determine the maximum selectivity that can be achieved. (6 marks) If the reaction is carried out in a CSTR, determine the volume that is required. (6 marks) Determine the effluent concentration of B, X and Y unit:mol/dm") c. d