A continuous rectification column operating at 1 atm is to be designed to separate a binary mixture of A and B (A is more volatile than B) . A distillate composition (Xd ) of 94 mol% A is achieved . The liquid over flowing from two adjacent plates contain 58 mol% and 75 mol% A , respectively. The equilibrium curve for the binary system at 1 atm is given in Figure below.

Solve graphically using the equilibrium curve and determine the reflux ratio..

could you please show me how you do it, so i can learn how to solve it.

thank you