Please choose the correct ending to complete the given sentence: Tennis serve with ball bouncing: The man man keeps serving and the #3 tips slides across the screen. The man swings the racket before serving. the man

Ending1: looks at the ground behind him before serving the ball. Ending2: waves his hand at the end of the video. Ending3: walks out of the frame. Ending4: continues to serve but misses and the #1 tips.

Answer format: ending1/ending2/ending3/ending4