$16-16.$ Compare the pressures given by $($a$)$ the ideal$-$gas equation, $($b$)$ the van der Waals equa$-$

tion, $($c$)$ the Redlich$-$Kwong equation, and $($d$)$ the Peng$-$Robinson equation for propane at

$400K$ and $=10\mathrm{.}62$mol$*d{m}^{-3}.$ The experimental value is $400$ bar. Take $=$

$9\mathrm{.}6938L^2\frac{*}{b}ar*mo{l}^{-2}$ and $=0\mathrm{.}05632L*mo{l}^{-1}$ for the Peng$-$Robinson equation. please explain all steps and show all work. a $=353\mathrm{.}2$ bar, b $=8008$ barr, c $=438\mathrm{.}4$ barr, d $=284\mathrm{.}2$ bar how did they get these answers