A distillation column operating at 1atm is used to separate a mixture of benzene and toluene. One-third of the feed is vaporised upon entering the feed tray. The feed contains 55 mol% benzene and flows at 1000kmol/hr. You desire a distillate containing 95mol% benzene and a bottoms containing no more than 5mol% benzene. The optimum reflux is found to be 3 . Use the equilibrium data given in graph attached. A. Calculate the flowrate of the distillate and bottoms B. Determine the number of theoretical trays needed