A thin disk wrapped with a thin ring is going to be used as a flywheel. The thin disk has a mass of $4$ kg and the thing ring has a mass of $5$ kg $.$ A diameter of $1$ m can be used for both the thin ring and the thin disk. Determine the moment of inertia about point O which is $0\mathrm{.}5$ m above the center of the disc. Please provide your answer in $\backslash (\backslash$mathrm$\{$kg$\}^\{*\}\backslash$mathrm$\{$~m$\}^\{2\}\backslash ).$