Question $2(35$ Points$)$: Calculate the moment of inertia of square member ABCD having a square void $($EFGH$)$ wrt to s axis $(I_S).$

$I_{rectangle-\text{b}\text{a}\text{s}\text{e}}=(\frac{1}{3})*b*h^3($Moment of inertia about the base$-$axis for rectangular area$)$

$I_{rectangle-\text{c}\text{e}\text{n}\text{t}\text{r}\text{o}\text{i}\text{d}}=(\frac{1}{12})*b*h^3($Moment of inertia about the centroidal$-$axis for rectangular area$)$