Distillation of benzene toluene (50/50) mixture requires 20 equilibrium stages plus a partial reboiler. The liquid viscosity determined at the feed-stage condition of 220F, Mbenzene = 0.1 CP and fltoluene = 0.1 CP and the relative volatility at the top and the bottom of the column is 2.52 and 2.25, respectively, Estimate EO, the number of actual plates required, and the column height, assuming 24-inch tray spacing with 4 ft above the top tray for removal of entrained liquid and 10 ft below the bottom tray for bottoms product surge capacity, using a) The Drickamer-Bradford b) O'Connell correlations