Let $I$ be the shaded region between the graphs of $f(x)=e^{-x}$ and $g(x)=-ex$. Let $II$ be the shaded region between the graph of $g(x)=-ex$ and the $x$-axis for $x\in[-1,0]$.  **Match each region with the volume of the solid formed when the given region is rotated about the $~y$-axis.** [[☃ matcher 1]]