Problem 2: Xylene, styrene, toluene and benzene are to be separated with the array of distillation columns that is shown below where F, D, B, D1, B1, D and B2 are the molar flow rates in mol/min. 7% Xylene 4% Styrene 54% Toluene 35% Benzene #2 18% Xylene 24% Styrene 42% Toluene 16% Benzene 15% Xylene 25% Styrene 40% Toluene-+ 20% Benzene 15% Xylene 10% Styrene 54% Toluene 21% Benzene F- 100 mol/min #3 24% Xylene 65% Styrene 10% Toluene 1% Benzene Figure 1 Separation Train