Please choose the correct ending to complete the given sentence: Playing badminton: A man serves a tennis ball on a tennis court. A player opposite of him hits the ball with his racket. the two men

Ending1: continue hitting ball until all of them score. Ending2: continuously play tennis until a point is scored. Ending3: speak to the camera. Ending4: stay on the court and interact.

Answer format: ending1/ending2/ending3/ending4