Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to install pergo flooring [title] Prepare the floor. [step] Clean any debris off the floor and secure any loose floorboards before attempting to install anything over the sub-floor. Make sure the sub floor is level with a carpenter's level.

Ending1: Address any soft spots by spackle if you're making a surface that requires molding or filling. [title] Make the heavy bottom of the floor a slab. Ending2: Floor leveling is usually only done on concrete floors, but you can find speckling product at the store that you can apply with large putty knives, if you've got a few spaces out of alignment. You can also just install pergo over the floor, even if it's a bit uneven, but you risk cracking or separating the tiles eventually. Ending3: This will keep you from damaging the floor. [substeps] If necessary, remove any furniture or heavy objects from the sub floor to avoid damaging the floor. Ending4: [substeps] Check the floor for loose or displaced pieces. [title] Place pergo-flooring approximately 1/4 on the floor and 4/8 on the floor outside of the sub-floor to make sure it is level with the floor base.

Answer format: ending1/ending2/ending3/ending4