Please choose the correct ending to complete the given sentence: Fixing bicycle: A man replaces a tire on his bike rim using tools. the man

Ending1: leans on the bike rim to remove dirt. Ending2: removes a thick chain and planks from a car tire rim using a glue pipe. Ending3: reattaches the bicycle wheel to the frame of the bike. Ending4: uses another gadget, then replaces it.

Answer format: ending1/ending2/ending3/ending4