7.13. Separation of benzene and toluene. A column at 101kPa is to separate 30kg/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 is at saturation temperature. Determine the: (a) top and bottom products and b) Liquid and vapor flow rates in rectifying and stripping