We are separating a mixture of benzene, toluene, and xylene in a distillation rectifying column. The column has a total condenser and no reboiler. The feed is a saturated vapor that is fed into the bottom stage of the column, flow rate F=150kmol/h, and feed is 52.0mol% benzene, 38.5mol% toluene, and remainder xylenes. Pressure is 1.0 atm, CMO is valid, and the relative volatilities are constant: BenTol= 2.22,Tol-Xy=2.01. The column is at 1.0atm. The reflux ratio L/D= 9 , and the distillate is 0.007 mole fraction toluene. a. Based on the best assumption you can make, use mass balances and CMO to calculate: B, mole fractions in bottoms, D, and mole fractions in distillate. b. Although the column has a feed and bottoms removal, we can still operate at total reflux (D=0 so that L/V=1). At total reflux, how many stages are required to obtain the separation achieved in part a