A city is setting up community garden plots for residents living in apartments. The plots will be arranged as shown and each will be 32 m?. Fencing will run between the plots and around the entire garden. The fencing between the lots costs $5/m and the fencing around the entire area costs $10/m. What should the dimensions of the plots be to minimize the cost of the fencing? Be sure to check that your answer is indeed for a minimum