Please choose the correct ending to complete the given sentence: Using the rowing machine: Then, the person fasten her feet to the machine and pulls the handle of the machine and sliding back. then

Ending1: , the person removes feet from the machine, after the person push the machine with both hands. Ending2: , the person holds the foot of the machine, so the person turn the knobs and adjust the screws. Ending3: , the person rest with the legs on the machine while talking. Ending4: , the person loosens the screws from her shoes and puts them in the machine.

Answer format: ending1/ending2/ending3/ending4