Q7. Diagram NOT accurately drawn D F B Figure shows triangle OAB and triangle OCD. 0A = 5p AB = 3q OC =-OB OD = -0A a) Find DC as a simplified expression in terms of p and q. (3) The line DC meets the line AB at F. b) Using a vector method, find OF as a simplified expression in terms of p and q. (6) The point G lies on OB such that FG is parallel to AO. c) Using a vector method, find OG as a simplified expression in terms of p and (4)