Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to install a bathtub [title] Ensure the new bathtub will fit in the space. [step] Measure the old bathtub and the doorway. Sometimes in the construction of a house, the bathtub was placed in the bathroom before the walls were completed, causing a problem when you need to remove it.

Ending1: Locate where the bathtub had been installed, and put the new tub on the outside of the walls. Use a flexible plumbing tape and trace the molding around the bathtub to make sure that the new tub fits in the place. Ending2: Cut out a 12 " (30 cm) piece of plywood, yellow flannel, or white plastic pvc to use for the bathroom liner. [substeps] It is necessary to regularly check for leaks to ensure proper entry and recovery. Ending3: If a new bathtub was installed before the existing one, ensure that it fits in the space properly so that it becomes a good match to the intended purpose of the bathroom. [substeps] Hire a professional plumber if necessary. Ending4: Make sure you can get the old one out and the new one in. [title] Buy a new tub with the drain on the same side as the old one.

Answer format: ending1/ending2/ending3/ending4