Please show all steps and processes thanks

1) A stream of air containing 12mol% of acetone is contacted with water in a perforated tray column. 90% of the acetone entering with the air is to be absorbed. The column is operating at 22C and 101kPa. At this T and P, equilibrium conditions for the acetone-water system are given by: Assume the vapor phase obeys Dalton's Law and that water stripping by air as well as air absorption by water is negligible. Determine the following: a. The minimum value of the ratio of moles of water in the absorbent stream per mole of air in the feed stream (Lmin/V). b. The number of theoretical trays required to accomplish this separation assuming 100% tray efficiency (i.e. trays are equilibrium stages) and L=1.3Lmin. c. The concentration of acetone in the exiting water stream. d. The number of actual trays required on the column assuming an EO of 0.65