Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to install a banister [title] Purchase a banister at a home-improvement store or on the internet. [title] Determine the correct height for the banister. [substeps] Contact your local building department for the codes that govern the installation of banisters.

Ending1: House inspection mandates that the banister be 18 inches (46 cm) high. The higher the height, the more powerful the banister will have to be. Ending2: Refer to the blueprints that you made and choose the appropriate height. [title] Pick out the type of banister you will need. Ending3: Mark the wall adjacent to the top and bottom stairs with the correct height. Stand a level vertically to ensure the accuracy of your markings. Ending4: Each home improvement store may have codes that you can call. Only judge the heights of the stairs, rather than the lengths at which they should be mounted.

Answer format: ending1/ending2/ending3/ending4