Please choose the correct ending to complete the given sentence: Fixing the roof: There's a man demonstrating how to use a hand setting tool. He is hammering nails into a wooden bar. he

Ending1: begins by putting three pieces of wood on top of each other. Ending2: uses the tool to properly align the nails before hammering it in. Ending3: removes the screws and screws the handles into the hollow of the bar. Ending4: repeats for himself, then uses a tool to hammer down the wood.

Answer format: ending1/ending2/ending3/ending4