Let A = {2, 3, 4, 6, 7, 9} and define a relation R on A as follows: For all x,ye A , XRy 3 divides (x -y). 1. List all the ordered pairs in the relation R? 2. Draw the directed graph of the relation R? 3. Determine whether the relation R is an equivalence relation? of tion i B I US X2 x2