A distillation column (at 101kPa ) is to separate 30kg/h solution of benzene and toluene containing 0.6 mass-fraction of toluene into an overhead product containing 0.97 mass-fraction benzene and a bottom product containing 0.98 mass-fraction toluene. A reflux ratio of 3.5 is to be used. The feed is a liquid at its boiling point, feed is to the optimal tray, and reflux is at saturation temperature. - Determine the quantity of top and bottom products. - Determine the number of stages required