$8\mathrm{.}24$ The dew point of a mixture of benzene vapour and dry air at $303K$ and $100$kPa is found to be $288K.$ The vapour pressure of benzene at $288K$ is $7\mathrm{.}8$kPa and at $303K$ is $15\mathrm{.}8$kPa. Determine the following:

$($a$)$ The absolute humidity and molal absolute humidity of the mixture

$($b$)$ The composition of the mixture in volume percent and weight percent

$($c$)$ The relative saturation and the percent saturation