Problem $2(5$ points$)$: An ideal gas has a molar mass of $31$ kg$/$kmol and a specific heat at constant pressure of $28\mathrm{.}5$ kJ$/($kmolK$).$ Find $($i$)$ the gas constant, in kJ$/($kgK$)$ and $($ii$)$ the specific heat at constant volume, in kJ$/($kgK$)$