Many students are familiar with the game “Wall Ball.” The game involves one player who throws a tennis ball off the wall, and the other players try to catch the ball in the air or off the bounce. If someone catches it, they throw the ball, and the other players try to catch it again. However, suppose a player (player one) fails to catch the ball, and it touches them. In that case, player one must run to the wall and touch it before another player can pick up the tennis ball and throw it against