A rectangular billiard table has vertices at P0,0 , Q0,7, R10,7, and S10,0. A small billiard ball starts at M3,4moves in a straight line to the top M3,4, moves in a straight line to the top of the table, bounces to the right side of the table, and then comes to rest at N7,1. The y-coordinate of the point where it is the right side is