differential distillation of benzene-toluene

Textbook Problem 26.3-3 Differential Distillation of Benzene-Toluene. A mixture containing 70mol benzene and 30mol% toluene is distilled under differential conditions at 101.32 kPa(1atm). A total of one-third of the moles in the feed is vaporized. Calculate the average composition of the distillate and the composition of the remaining liquid. Use the equilibrium data from Table 26.1-1 shown below