Please choose the correct ending to complete the given sentence: Welding: The man applies his glove to his left hand. The man taps a metal with a soldering iron. the man

Ending1: soldiers on the piece of metal. Ending2: places contact lens to his right eye. Ending3: applies the metal to a wooden table. Ending4: places two metal pieces two on top of the metal two times.

Answer format: ending1/ending2/ending3/ending4