$37.$ Four objects are held in position at the corners of a rectangle by light rods as shown in Figure P$8\mathrm{.}37.$ Find the moment of inertia of the system about $($a$)$ the $\backslash ($ x $\backslash )-$axis, $($b$)$ the $\backslash ($ y $\backslash )-$axis, and $($c$)$ an axis through $\backslash ($ O $\backslash )$ and perpendicular to the page.