Answer:
The possible midpoints are (5.5,8) and (5.5,3)
Explanation:
Given


Required
Determine the midpoint of DE
First, we need to determine the coordinates of E
If E is to the right of DE;




Hence, the coordinate is (11,16)


Else:




Hence, the coordinate is (11,6)


The possible midpoints are (5.5,8) and (5.5,3)