The order pairs for the midsegment are (-1,3.5) and (-1,2).
You can find this points by finding the midpoint of the segments below:
Midpoint of FD: (-3+1/2, 3+7/2) Midpoint of EF: (1+-3/2,-1+3/2)
(-2/2,7/2) (-2/2,4/2)
(-1,3.5) (-1,2)
You plot the two points on the coordinate plane, and the draw a line between the two point of these form the line is parallel to DE.