1. PY =8
2. XM =42
3. PM = MY
4. MY = 8

Answer:
PY = 8
Step-by-step explanation:
Since, a point (here P) lying on the perpendicular bisector of a segment is equidistant from the extreme points (here X and Y) of the segment.
So, PX = PY
But, PX = 8 (given)
Therefore, PY = 8