Please choose the correct ending to complete the given sentence: Spinning: A woman is seen speaking to the camera while pointing to an exercise bike. sh

Ending1: men are seen installing grips around the bike's tire and then screwing in the tire. Ending2: it shows the man working out on the machine. Ending3: is shown preparing the machine and begins riding towards the camera. Ending4: adjusts the settings on the bike and climbs on top to begin riding.

Answer format: ending1/ending2/ending3/ending4