Please choose the correct ending to complete the given sentence: Welding: A man is standing inside a workshop. he

Ending1: is using a bicycle a is laying on the ground. Ending2: is welding something on the ground in front of him. Ending3: leans over, welding a piece of metal. Ending4: is rubbing the ice off of a car with a brush.

Answer format: ending1/ending2/ending3/ending4