In trapezoid $WXYZ$, $\overline{WZ}$ is perpendicular to $\overline{ZY}$, $WZ=5$, $WX=4$, and $ZY=10$. In addition, $V$ is on $\overline{ZY}$, and $\overline{XV}$ is parallel to $\overline{WZ}$. Find the area of $△XVY$.