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A plant must distill a mixture containing 75 mol % methanol and the rest is water. The overhead product is to contain 95 mol % methanol and the bottom product 5 mol %. The feed is cold, and for each mole of feed 0.15 mol of vapor is condensed at the feed plate. The reflux ratio in the total condenser at the top of the column is 1.4, and the reflux is at its bubble point. 1 0.9 0.8 (a) Calculate the minimum number of plates (whole number, not decimal) using the McCabe-Thiele method. Draw directly on the diagram or trace it/ copy it onto your own paper. ↓ 0.7 0.6 0.5 0.4 (b) The number of plates (whole number, not decimal) not counting the condenser and total reboiler, assuming ideal plates. 0.3 0.2 0.1 * Use points at red arrow to help you draw your diagram. 0.9 1 0 0 0.1 = 0.2 0.3 0.4 0.5 0.6 0.7 0.8