100 Kmol/hr of a feed of 75% benzene and 25% heptane is to be separated by distillation. The distillate is to be 95% benzene and the bottoms 5% benzene. The feed enters the columnas 3Smol% vapor. Use R 2.5 times the minimum. Assume a constant relative Volatility a is equal 4 and that the pressure is constant throughout the column atlatm. Calculate maximum number of plate? Select one a. 6 e b 9 ed