Please choose the correct ending to complete the given sentence: Kneeling: A man, alone in a room demonstrates two arm pulls with an elastic band attached to a white pole in a room, while he kneels on a blue gym mat. a man in grey shorts and black sneakers

Ending1: shown showing flips in slow motion and on his knees as well. Ending2: practices arm pulls with an attached band while a young man in gray shorts joins him. Ending3: folds the free arm of the man dressed in the gym mat against the black pole. Ending4: kneels on a blue gym mat in the corner of a room and pulls and elastic band from behind him with his arms.

Answer format: ending1/ending2/ending3/ending4