Midpoint of a line PQ where P has coordinates (x1, y1) and Q has coordinates (x2, y2) is given as
(x1+x22,y1+y22).
∴ If Q has coordinates (r, s), then
−2+r2=2 and 1+s2=3
−2+r=4impliesr=6
1+s=6impliess=5
Q = (6, 5)
