Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to touch the bottom of a pool [title] Go to a local or private pool that has a diving board that you are allowed to use. [title] Set the diving board to a loose setting, for some boards are set stiff. [step] You might need some help doing this, but only do it if you are not breaking any rules.

Ending1: However, if you are at the pool and have a slide to choose from you can always set this up yourself. [title] Find a heat and a place that has a completely smooth surface to go. Ending2: [title] Make sure you put your board in warm water, not on dry skin before diving. [step] A cool place to dive is near the water's edge, but pools tend to be drier and have more moisture, which can lead to dry skin. Ending3: [title] Climb up the steps on the board. [title] Walk quickly to the point where the tip of your big toe is about 3-4 inches (7.6-10.2 cm) away from the edge of the diving board. Ending4: [title] Position the diving board up at the water's edge. [step] This is especially true if you are swimming with friends, as most pools let you board with anybody who you trust.

Answer format: ending1/ending2/ending3/ending4