A baton is constructed by attaching a $0\mathrm{.}5$kg sphere to each end of a $0\mathrm{.}75$m long rod. If the rod has a mass of $0\mathrm{.}25$kg$,$ what is the moment of inertia if the baton is twirled around the end of the rod? A$.0\mathrm{.}33$kgm$2$ B$.0\mathrm{.}15$kgm$2$ C$.0\mathrm{.}61$kgm$2$ D$.0\mathrm{.}8$kgm$2$