Dоnnа is plаnning tо lаndscape her backyard and is thinking оf having a fake grass area for her pets and a small picnic area on the side. She plans to put the grass on a rectangular area and right next to it is a picnic area in a semi-circular shape. The figure below shows the shape of this grass and picnic area: She plans to put fencing around the border of the entire area, but the border between the grass and picnic area will not be fenced. If she has a total of 40 feet of fencing to use, what is the largest possible area of both grass and picnic areas? (Round all values to 2 decimal places.) Round your answer to the nearest whole number. Show all steps of your work on your paper, including the unit for the final answer. (5 points)