$3\mathrm{.}53.$ Calculate the molar volume of saturated liquid and the molar volume of saturated vapor by the Redlich$/$Kwong equation for one of the following and compare results with values found by suitable generalized correlations.

$($a$)$ Propane at $40C$ where $P^{\text{s}\text{a}\text{t}}=13\mathrm{.}71$ bar

$($b$)$ Propane at $50C$ where $P^{\text{s}\text{a}\text{t}}=17\mathrm{.}16$ bar

$($c$)$ Propane at $60C$ where $P^{\text{s}\text{a}\text{t}}=21\mathrm{.}22$ bar

$($d$)$ Propane at $70C$ where $P^{\text{s}\text{a}\text{t}}=25\mathrm{.}94$ bar