Please choose the correct ending to complete the given sentence: Ping-pong: A man is using a robotic machine to play table tennis. Another man stands at the end of the table. the man and the machine

Ending1: continue serving as the game continues. Ending2: continue to play table tennis as the audience claps. Ending3: hit the ball back and forth. Ending4: finish serving and step away.

Answer format: ending1/ending2/ending3/ending4