$18\mathrm{.}8.$ An absorber is to remove $97($not $99,$ pleasw slove it $97\%)$ percent of solute A from a gas stream containing $4$ mol percent $A.$ Solutions of $A$ in the solvent follow Henry's law, and the temperature rise of the liquid can be neglected. $($a$)$ Caleulate $N_{0y},$ for operation at $1$atm using solute. free liquid at a rate of $1\mathrm{.}5$ times the minimum value. $($b$)$ For the same liquid rate, calculate $N_o$y$,$ for operation at $2$ atm and at $4$atm. $($c$)$ Would the effect of pressure on $N_{Oy},$ be partly offset by a change in $H_O$y$?$