Please choose the correct ending to complete the given sentence: Doing crunches: A woman demonstrates how to do sit ups, in a gym room, using a woman who is simulating the exercise as an example. a woman

Ending1: kneels on the hardwood floors of a gym room and talks to the camera. Ending2: stands with legs slightly parted and demonstrates more self-pressing techniques scrolling down. Ending3: at a table talks into the camera while the woman sets a cowboy hat down. Ending4: uses a half-block exercise machine, by herself, to exercise.

Answer format: ending1/ending2/ending3/ending4