A packed scrubber with 20 transfer units has been designed to reduce the solute concentration in \(80 \mathrm{kmol} / \mathrm{h}\) of air from a mole fraction of 0. 01 to 0. 006 . The solute is absorbed into a \(20 \mathrm{kmol} / \mathrm{h}\) solvent stream, and it can be assumed that the solvent stream enters solute free. If the flow of solvent is decreased by \(15 \%\), what is the new outlet mole fraction of solute in air?