A steady$-$state distillation column is designed to separate benzene from toluene. The separation is nearly enough complete that, for the purposes of designing the reboiler and the condenser, we can model the material in the reboiler as pure toluene and the material in the condenser as pure benzene.

$10mo\frac{l}{s}$ of toluene enters the reboiler as saturated liquid at $P=1\mathrm{.}1$ bar. $80\%$ of the entering toluene is boiled and returned to the column as