A farmer is building a fence to enclose a rectangular area against an existing wall, shown in the figure below. Fenced in Region Three of the sides will require fencing and the fourth wall already exists. If the farmer has 144 feet of fencing, what are the dimensions of the region with the largest area? Select the correct answer below: O36 feet by 72 feet O44 feet by 64 feet 24 feet by 84 feet 32 feet by 76 feet 20 feet by 88 feet