Please choose the correct ending to complete the given sentence: Ping-pong: Two men are inside a gym together. They are engaged in a game of table tennis. they

Ending1: kick the tennis ball back and forth against the wall. Ending2: hit the ball back and forth over the net. Ending3: crash into each other and then continue to play the game. Ending4: punch and kick at each other as they play.

Answer format: ending1/ending2/ending3/ending4