A box with an open top is to be made by taking a square piece of cardboard with side lengths 4 feet and cutting out squares of side length x from each corner and bending up the sides. Which of the following functions gives the volume of the box in terms of x. O V = x2(4 – 2x) O V = x(4 – 2x) O V = x2(4 – x) O V = x(4 – x)