Please choose the correct ending to complete the given sentence: Using the rowing machine: A man is working out on a machine. He stands up and talks to the camera. he

Ending1: starts changing his tool by pressing the one strip at a time. Ending2: makes up the slack line while the camera records. Ending3: is then shown in a gym hammering out a piece of wood on a board. Ending4: sits down on an exercise machine and starts to work out again.

Answer format: ending1/ending2/ending3/ending4