Please choose the correct ending to complete the given sentence: Welding: The welder is held over a steel plate and moved slowly. The man pulls the welder over a copper colored piece of metal. the man

Ending1: puts down his face guard and welds a spot on a piece of metal. Ending2: screws on a small flat plate and lower the metal plate to fit in the metal ring. Ending3: pointed at the metal piece and started welding the metal one ball at a time. Ending4: brushed it over the aluminum.

Answer format: ending1/ending2/ending3/ending4