A banner has a red border and a rectangular white centre. The width of the border at top and bottom is 8 inches, and along the sides it is 6 inches....

A banner has a red border and a rectangular white centre. The width of the border at top and bottom is 8 inches, and along the sides it is 6 inches. The total area of the banner is 27 square feet. What should the dimensions of the banner be if the area of the white centres is to be maximized? Hint: 12 in= 1 ft