Please answer clearly, thanks!

1) Two bumper cars [of equal mass) at Canada's Wonderland experience a perfectly elastic collision. Bumper car A, initially, is travelling North at 3.0 m/s and bumper car B, initially, is travelling East at 4.7 m/s. After the collision, if bumper car B is travelling North, what are the speeds of both bumper cars and the direction of bumper car A