Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to measure trampoline springs [title] Wear gloves and safety goggles to protect yourself. [step] The springs on the trampoline can be rough on your bare hands, especially if there are no protective coverings on the hook ends of the springs. Wear gardening gloves or thick work gloves to protect your hands.

Ending1: [title] Pull the springs off the trampoline and mount them on the bar. [step] Once they're all off the hook end, take a moment to determine the motion of the springs. Ending2: Get safety goggles so your eyes are protected in the event the spring flies in your face. [title] Unhook the first spring from the trampoline with flat-head pliers. Ending3: [substeps] Use a tape measure to measure the length of the trampoline. Measure 3 feet from the hook end to the other. Ending4: [title] Measure the length of the trampoline. [step] You can use a tape measure to get the height of the trampoline.

Answer format: ending1/ending2/ending3/ending4