Please choose the correct ending to complete the given sentence: Welding: A boy enters the scene and pulls on a pair of gloves while wearing a sports protective mask, turns on a blue machine on the back steps and picks up a solder. The boy then begins to solder a disassembled bicycle on the ground in a backyard. the boy

Ending1: proceeds to remove the screws from a floorboard on the bicycle by pushing several buttons on a machine. Ending2: pans over a pair of gloves also secured on a detached hose rack. Ending3: then gets up and walks out of the scene after lifting the lid on his mask. Ending4: finishes, puts on a white mask as an adult walks in and sits on a lawn chair, watches, and films.

Answer format: ending1/ending2/ending3/ending4