Please choose the correct ending to complete the given sentence: Using the rowing machine: As he is sitting down in the gym, he grabs the bar and begins moving back and forth on the seat. while he

Ending1: is seated, his legs move from a straight position to a ninety degree angle each time, while simultaneously pulling the bar. Ending2: is moving he's looking down and then on the rope and continues to do karate moves using both hands. Ending3: has his knees up, he begins to lean forward and begin playing his music. Ending4: 's sitting, he rubs the boarder and points him to his legs.

Answer format: ending1/ending2/ending3/ending4