Please choose the correct ending to complete the given sentence: Using the rowing machine: A man exercise on a rowing machine pulling a handle and moving forward and backward. Then, the man increases the resistance of the machine and continue exercising. the foam seat

Ending1: is removed and the man stands on the exercise machine in a green shirt and shorts. Ending2: is contoured and looks comfortable. Ending3: is attached to the dryer, holding down the body. Ending4: is taken from the front.

Answer format: ending1/ending2/ending3/ending4