Please choose the correct ending to complete the given sentence: Using the rowing machine: A man speaks to the camera while another man sits on a piece of exercise equipment behind him. the instructor

Ending1: waves to the camera and the man hits a wall repeatedly. Ending2: speaks the man while moving the man around and his feet work. Ending3: continues talking about the exercise and showing martial arts moves. Ending4: continues moving around near the man and has him show how to machine works.

Answer format: ending1/ending2/ending3/ending4