A monatomic ideal gas that is initially at $1\mathrm{.}50*105$ Pa

and has a volume of $0\mathrm{.}0800$ m$3$

is compressed adiabatically to a

volume of $0\mathrm{.}0400$ m$3$

$.($a$)$ What is the final pressure? $($b$)$ How much

work is done by the gas? $($c$)$ What is the ratio of the final tempera$-$

ture of the gas to its initial temperature? Is the gas heated or cooled

by this compression?