For the composite shape shown below, the small square is a hole. All units are in inches and the origin is located as shown.

a$)$ Locate the centroid of the composite shape $(12\mathrm{.}5$ points$).$

b$)$ Calculate the Moment of Inertia about the $y-$axis $(7\mathrm{.}5$ points$).$

c$)$ If you had to calculate the Moment of Inertia about the centroidal $y$ axis, what would $d_x$ be$?(5$ points$).$