$2.$ A monatomic ideal gas expands from point $\backslash (\backslash$mathbf$\{$A$\}\backslash )$ to point $\backslash (\backslash$mathbf$\{$B$\}\backslash )$ along the path shown in the figure. How much heat has been added to the gas during the process? $($The horizontal axis is marked in increments of $\backslash (1\mathrm{.}00\backslash$mathrm$\{$~m$\}^\{3\}\backslash ).)$

J