HELP!

1. The area of trapezoid $PQRS$ is $60$. One base is $7$ units longer than the other, and the height of the trapezoid is $5$. Find the length of the median of trapezoid $PQRS$.

2. In trapezoid $WXYZ, \overline{XY} \parallel \overline{WZ}, \angle WXZ = 105^\circ, \angle W = 43^\circ,$and $\angle Y = 141^\circ$. Find $\angle YXZ$, in degrees.