The coordinates of three vertices in the parallelogram ABCD are a (- 3,4); B (- 2,1); C (1,6) to find the coordinates of D?

The coordinates of three vertices in the parallelogram ABCD are a (- 3,4); B (- 2,1); C (1,6) to find the coordinates of D?

O is the coordinate origin (0,0)
Vector CD = vector od vector OC
Parallelogram = > vector CD = vector Ba
Vector od = vector OC + vector OA - vector ob
=(1,6)+(-3,4)-(-2,1)
=(0,9)
The coordinates of D are (0,9)