Please choose the correct ending to complete the given sentence: Installing carpet: Several men are installing flooring in a large non-residential room. a man

Ending1: is cleaning something in the window of the room. Ending2: is welding the ceiling of the room. Ending3: is using a fork to glue the tiles together using a tool from a large leaf blower. Ending4: is using a tool to score the floor.

Answer format: ending1/ending2/ending3/ending4