A column at 101 kPa is to separate 30 kg/h of a bubble-point solution of benzene and toluene containing 0.6 mass fraction toluene into an overhead product of 0.97 mass fraction benzene and a bottoms product of 0.98 mass fraction toluene at a reflux ratio of 3.5. The feed is sent to the optimal tray, and the reflux ratio is at saturation temperature. Determine: a) Flowrates of distillate and bottoms b) Number of equilibrium stages needed EQUILIBRIUM DATA IN MOLE FRACTION BENZENE, 101 kPa 0.21 0.72 0.79 X 0.37 0.2 0.51 0.3 0.64 0.4 0.86 0.7 0.91 0.8 0.96 0.9 0.98 0.95 0.1 0.5 0.6