Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to assemble a vuly trampoline [title] Lay out the parts. [step] Start by laying all of the parts from the trampoline box on the ground. [title] Join the curved poles.

Ending1: [step] Fold the poles in half so that one pole lines up with the other poles. Make sure that the poles line up precisely so that they look even. Ending2: [title] Lay out the end of the trampoline measuring 1 foot (0.31 m) from the edge of the trampoline box. [title] Connect the poles by attaching the bell's jaws to one end of the trampoline box. Ending3: [step] Take two curved poles and join them together. Join all of the other curved poles together, so they are in pairs on the ground. Ending4: [step] Line the bow and the left pole up with each other. Although it is easiest to do using the equipment that came with the trampoline, being able to lay on top of it may be helpful when assembling a kettlebell.

Answer format: ending1/ending2/ending3/ending4