hi , i would like more explanation in steps of the answer. thanks .

- An absorption system is used to reduce the concentration of a pollutant (A) in an off-gas stream using water as a solvent - Inlet gas flow rate (G1)=13.6mol/s.m2 - Inlet liquid flow rate (L2)=27.2mol/s.m2 - The tower height, z=12m - The concentration of pollutant in gas is reduced from 2 to 0.5% - The overall mass transfer capacity coefficient (Ky.a) is proportional to L0.4 - Equilibrium data is given by yA=1.5xA - Environmental regulations require the pollutant concentration in the effluent gas stream to be