A saturated liquid mixture containing 40 mol% n-pentane and 60 mol% n-hexane is to be separated by continuous distillation. The top product should contain 95% of the n-pentane in the feed and the bottom product is expected to contain 97% of the n-hexane in the feed. The distillation column will operate at a total pressure of 100 psia. For this process, a total condenser and a partial reweed are going to be used. (a) Determine the minimum number of plates required for the separation. (b) Find the minimum reflux ratio. (c) If the operating reflux ratio is 1.2 times the minimum, how many plates will be required to effect separation? Use the McCabe-Thiele method