A green puck with mass 10 kg strikes a stationary yellow puck with mass 10 kg. the green puck was moving at a velocity of 7i-6j m/s, and its center...

A green puck with mass 10 kg strikes a stationary yellow puck with mass 10 kg. the green puck was moving at a velocity of 7i-6j m/s, and its center was at (1,2) when it it the yellow puck. which of the following could be the velocities of the pucks after the collision? (Assume the collision is elastic)