7. To wrap an expensive gift, you'll need a box. Graph the following equation: (12-2x) (19 2x)(x), which represents of the volume of a box made from a rectangular cardboard sheet 12 inches wide and 19 inches long from which a square is cut from each corner and the sides of the box are folded as shown. The value x represents the side length of the square cutout. What is the length (a) of a side of the square cut from each corner of the paper used to find the maximum volume for V = (12-2x)(19-2x)(x) Round your answer to the nearest hundredth.