$(3$ cont$)$ The figures below shows the graphs of $f(x)=2\sqrt[\phantom{2}]{x},g(x)=\frac{x^2}{4},y=4,$ and $x=4.$ d$.$

Set up the integral or integrals needed to find the volume formed by rotating $R_2$ about the $y$ axis.

e$.$ Set up the integral or integrals needed to find the volume formed by rotating $R_1$ about the line $x=4.$

f$.$ Set up the integral or integrals needed to find the volume formed by rotating $R_2$ about the line $y=4.$