A tray tower is to be designed to absorb Nh fo from air stream by using pure water at 293K. The entering gas contains 80 mol\% NH and that leaving 4mol% at a total pressure of 1atm. The inert air flow rate is 600kg h hat and the entering water fow rate is 5000kg/h.m. The equilibriurn data for ammonia-water system is shown below. a) Determine the theoretical trays for the above separation. b) By assuming the tray efficiency is 30%, determine the actual trays needed for the process. c) If the minimum solvent fiow rate is 350kg molith.m2, determine the number of trays graphically. Use 1.5 times the minimum flow rate