Please choose the correct ending to complete the given sentence: Ping-pong: There are two people dressed in red shirts and blue shorts playing ping pong in a large stadium with lots of spectators watching them. the players

Ending1: advance up the court paced with an audience and each player serves a ball that is placed against the wooden table. Ending2: move back and forth with the ball and then another person starts to play the game the same way, fast. Ending3: are swinging on the pier of a building amidst many spectators. Ending4: play a long round of ping pong as they continue to maintain a great rally.

Answer format: ending1/ending2/ending3/ending4