The exit gas from an alcohol fermenter consists of an air–CO2 mixture containing 10 mol% CO2 that is to be absorbed in a 5.0-N solution of triethanolamine, containing 0.04 mol CO2 per mol of amine solution. Assume that the column operates isothermally at 25∘C, the exit liquid contains 78.4% of the CO2 in the feed gas to the absorber, and absorption is carried out in a six-theoretical-plate column. Then use the equilibrium data below to calculate (a) exit-gas composition and (b) moles of amine solution required per mole of feed gas.