At the end of a manufacturing process a granular solid material is coated with liquid acetone. The composition of this solid$/$liquid mixture is $82\mathrm{.}0\%\frac{w}{w}$ solid and $18\mathrm{.}0\%\frac{w}{w}$ acetone. The solid$/$liquid mixture passes through a dryer in which completely dry air is used to vaporize some of the acetone. The dry air enters the dryer at a flow rate of $1\mathrm{.}70\frac{m^3}{m}in$ at a temperature of $23\mathrm{.}2C.$ The air leaves the dryer saturated with acetone vapour at a temperature of $25\mathrm{.}4C.$

Calculate the composition of the solid$/$liquid acetone mixture leaving the dryer as stream $(2).$ Also, calculate the volumetric flow rate of the air$/$acetone mixture leaving the dryer as stream $(4).$

A psychrometric chart for the acetone$-$air system is supplied. In answering this question please read the chart as accurately as possible.