Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to repair concrete steps [title] Clean the damaged portion of the concrete step. [step] Remove all loose gravel, sand, dirt, and cement with a clean, stiff wire brush. [title] Make a form.

Ending1: [step] For this step, you will need a wheelbarrow or any suitable vehicle. A 3-foot (0.91 m) long wooden post cut to the exact desired length can work well for this step. Ending2: [step] Screw 2 short pieces of 1 inch by 6 inch (2.54 cm by 15. 24 cm) lumber together at a 90-degree angle to form an " l " shape. Ending3: [step] Use a model from an older model. Attach the water line on the side, clockwise, to the concrete step. Ending4: [step] Cut a 2-foot (0.91 m) piece of material that is the same height of the damaged portion, such as firewood, door frames, or sign. The piece should be long enough to wrap around the severe injury.

Answer format: ending1/ending2/ending3/ending4