. In a distillation column it is required to take a side product with a composition of 65% by mole methanol (A) and 35 %by mole water (B). The feed to the column is 50% in A and is an equilibrium mixture of liquid and vapor in a molar proportion of 4 to 1. The top product having 95% A is taken from a total condenser. The molar ratios of side stream (saturated liquid) to top product, and of feed to top product are 0.30 and 2.5, respectively. Determine the number of equilibrium stages required to perform the separation if the reflux ratio is 1.3. Calculate also the minimum reflux ratio and the minimum number of plates for the problem.