A tray tower is absorbing ethyl alcohol from an inert gas stream using pure water at 303K and 101.3kPa. The inlet gas stream flow rate is 100kgmol/h and it contains 5.2mol% alcohol. It is desired to recover 98% of the alcohol. The equilibrium relationship is y=mx=0.68x for this dilute stream. Using 1.3 times the minimum liquid flow rate, (a) determine the number of trays required graphically. (Hint: Need to include intermediate points) (14 marks) (b) determine the number of theoretical trays needed using analytical equations. (8 marks) (c) From (a) and (b), discuss the difference between the values obtained in (a) and (b)