Please choose the correct ending to complete the given sentence: Elliptical trainer: A man is using an elliptical trainer while standing. Then a woman sits on it as she uses it in another fashion. it

Ending1: 's then shown under an exercise machine. Ending2: switches between the two as they exercise. Ending3: is the same machine, next to the man on the treadmill. Ending4: then shows the replay of the first woman.

Answer format: ending1/ending2/ending3/ending4