Please choose the correct ending to complete the given sentence: Tennis serve with ball bouncing: The instructor shows how to hold and move with the racket. Footage of a game with two people playing is shown. a student with shades

Ending1: under his eyes talks about the game. Ending2: in his hand poses while demonstrating. Ending3: is now in the video as he and the instructor further help to explain the video as the student shows how to return serve the balls. Ending4: on and who catch her and send her back to her friends to wash her hands.

Answer format: ending1/ending2/ending3/ending4