Q2: A 100 moles/h of a feed mixture of A and B (50 mole % A and 50 mole % B) at its' bubble point is to be separated into a top product containing 96 mole % A and a bottom product having 95 mole % B. A external reflux ratio of 3.5 mole is to be used and da = 3.8. = (a) Calculate the moles of overhead product (D) and bottom product (B) per hour. [2 marks] (b) Determine the number of ideal plates and the position of the feed plate. [2 marks] (c) What is the number of real trays if tray efficiency is 40%? [1 mark]