3) A binary mixture of methanol and water is to be separated in a continuous multistage distillation column at an operating pressure of 1atm. The feed is saturated liquid with a flow rate of 100kmolhr1 and a methanol mole fraction of 0.25. The column must achieve a recovery of 90% and a mole fraction of 0.95 methanol in the distillate. The reflux ratio is to be 1.5 times the minimum. Determine the number of ideal equilibrium stages required. xy diagram for methanol/water at 1 atm