(4)Maximizing Volume(i)Squares with sides of length x are cut out of each corner of a rectangular piece of cardboardmeasuring 3 ft by 4 ft. The resulting piece of cardboard is then folded into a box without a lid. Find the volume of the largest box that can be formed in this way.(ii) Suppose that in part (i) the original piece of cardboard is a square with sides of length l. Findthe volume of the largest box that can be formed in this way.