9. Evaluate the centroid of the triangle

$\triangle ABC$ has the following mid-points $D($42, 18$)$, $E($12, 54$)$ and $F($24, 30$)$. If $D$ is the mid-point of $AC$, $E$ is the mid-point of $AB$ and $F$ is the mid-point of $BC$, find the centroid of the triangle.