Figure 1 shows the elementary reactions of ethylene oxide in series take place in a continuous constant-flow stirred tank reactor (CSTR) under isothermal conditions. The rate constant, kaks + kz and with initial CA=Cao and C5o= Cco= Coo=0. Given Vo= 1000 L'h', k= 1 min-, ke= 2 min' and k3=1 min- and CA= 1 mol-h-?. CHOCH (CH2CHO) (B) -CH(C) NHCOCH.CO2H (D) Figure 1 Reaction of ethylene oxides in series ii) Calculate the size of the CSTR (Vopt) that will maximize the yield of B. (8 marks)