Please choose the correct ending to complete the given sentence: Welding: A man in welding attire welds a piece of metal to another piece of metal on camera. a man wearing protective clothing and a metal welding hat

Ending1: stands in front of a piece of metal missing a long strip on the face of it. Ending2: welds an item other. Ending3: welds tiles together while speaking to the camera. Ending4: welds a piece of metal without welding anything.

Answer format: ending1/ending2/ending3/ending4