Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to build a car to save gas [title] Put together the appropriate parts. [step] Join the front sections of two identical scooters and one rear part with the engine and you have the foundation of a basic, three-wheeled car that you can build. [title] With the appropriate safety gear, cut the frame.

Ending1: [step] Use the faulty parts to snip down the wheels. Using a chisel to cut the engine out. Ending2: [step] If you need to and without hassle for trying, make sure that you have a different permit. Put on a new, square, sturdy part of the frame if you need to make a new one. Ending3: [step] ( in the background, you see the rear portion of the second scooter, which was not needed. ) [substeps] Start working on the main chassis. Ending4: [step] The front to back piece is one, as explained above. [substeps] Better from the tube length's end, measure around this for a square of inch and 1 inch by 3/8 inch.

Answer format: ending1/ending2/ending3/ending4