√4) A gas stream containing 90 mol% N2 and 10% mole CO2 is passed through an absorber, in which pure and cool water at 5°C is used as a solvent. The operation is assumed to be isothermal at 5°C and isobaric at 10 atm. The liquid flow rate is 1.5 times the minimum liquid flow rate. Determine the number of equilibrium stages required to absorb 92 mol% of CO2 given that Henry's constant for CO₂ in water at 5°C is 876 atm/mole fraction.