anyone can help me answer asap please

A laboratory experiment was carried out to convert liquid waste chemical (A) into valuable product (B) in a mixed flow reactor using enzyme X as a homogeneous catalyst at a specific concentration CE. The results were as follows: CAO (mol/L) CA (mol/L) t (min) 2 0.5 5 3 1 6 1 50 30 UN 6 2. 8 11 6 4 14 16 24 10 8 4 20 20 4 The aim is to have the 90% conversion of the waste chemical into product (B) using PFR with recycle at 100 L/min of incoming flow of the liquid chemical waste (CAO = 10 mol/L). The best recycle ratio was found to be 0.61. a) Find the volume of PFR to be used. You might need to plot appropriate graph. (8 marks) b) Determine the recycle flowrate (VR) for the recycle stream. (2 marks) [10 marks]