Coordinates geometry parallelogram problem

Parallelogram OPQR lies in the xy-plane, as shown in the figure above. The coordinates of point P are (2, 4) and the coordinates of point Q are (8, 6). What are the coordinates of point R ?

A. (3, 2)
B. (3, 3)
C. (4, 4)
D. (5, 2)
E. (6, 2)

In this question, is it possible to solve by considering point P and O? Can the process be explained, as i am getting wrong answers.

Also can we determine area of the said parallelogram from the given information? If we want to determine Area or perimeters, how and what should be done??

Consider O as Origin and you will be able to solve it!

Hey… could you explain the process??