Please choose the correct ending to complete the given sentence: Laying tile: The video shows a tutorial on how to install ceramic tiles using concrete. a person wearing an orange vest and black pants

Ending1: lancing tiles on concrete tiles uses a scraper to work the tiles. Ending2: is working on tiling a room in a house. Ending3: is helping as they extend tiles to the end of a roof. Ending4: stands on top of tiles with a large properly placed tile for installs.

Answer format: ending1/ending2/ending3/ending4