Question $1$

A $5$ mm by $50$ mm by $300$ mm steel bar has two round steel disks, each $50$ mm in diameter and $20$ mm long, welded to one end. A small hole is drilled $25$ mm from the other end. Using $7800k\frac{g}{m^3}$ for the density of steel, find the mass moment of inertia of the bar about an axis through the hole. Assume that the mass and inertia of the small drilled hole are negligible.