Don't copy paste the answer which is solved before. And please write with hand, not computer

A non-volatile oil containing 4% (mole percent) propane is treated directly with superheated steam in a gas separation tower. The percentage of propane at the tower exit is 0.2%. The total pressure is 2 atm and the temperature is 1500C. For a stream of 100kmol (oil +C3H8 ), there are 3.808kmols of steam. The equilibrium data under these conditions are given by the equation y=25x. Here y; mole fraction of C3H8 in steam, x; It is the mole fraction of C3H8 in oil. Find the theoretical number of trays required to achieve the seperation