Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to pour exposed aggregate concrete [title] Build a wooden box. [step] This box will hold the concrete in place until it is fully cured. It is important it is symmetrical and nailed together properly because your concrete pad will resemble this box.

Ending1: [substeps] Ensure that the roof edge is even and that the sides are flush with each other. The bottom of the box should have grooves to it that your workers can cross off to one side or the other. Ending2: An outer box can also be used as your piggy bank. When using an outer box, tape the edges to the box very tightly to prevent them from coming apart. Ending3: A wooden box will not fit snugly inside your home. [substeps] Find a box 6 foot (1.8 m) or 3 feet (3.7 m) in height and 1 foot (30 cm) in width. Ending4: [substeps] Use 2x4s in order to obtain 4 inch thick concrete. Use 2x6s in order to obtain 6 inch thick concrete.

Answer format: ending1/ending2/ending3/ending4