Benzene is produced by catalytic hydrodealkylation of toluene: CH3CH3 + H2 CH + CH4 2 C6H6 C12H10 + H2 The reactor's outlet consisting of the products (Benzene and methane), the unreacted hydrogen and toluene, and by-product biphenyl is separated into four products, H2/methane, Benzene, Toluene, and biphenyl, using a series of distillation columns. a) (20 Points) Label each of the four product streams in the provided sequence. b) (40 Points) If each component's recovery in its corresponding stream is 95%, estimate the composition of each product stream in kmol/h. State any made assumptions. c) (20 Points). Draw a better distillation sequence and explain why it is better than the provided sequence. Flow Rate, kmol/h Hydrogen 500 Methane 2000 Benzene 400 Toluene 100 Biphenyl 25 CL