1. A distillation column is to be designed that will benzene (B), toluene (T), and cumene(C). The feed is 100 kmol/h, saturated vapor, 40 mol% benzene, 30 mol% toluene, and 30 mol% cumene. We wish to recover 98% of the benzene fed in the distillate, and to recover 99% of the toluene fed in the bottoms. The column is to operate at 1.25RMIN. It may be assumed that the following relative volatilities are constant: Apt = 2.25, acr = 0.21. Determine total number of stages and identify the optimal feed stage. Points-30 Ini.....ini