Gotta have this finished in an hour and idk how to do this

your parents have finally decided to install an in-ground pool! they come to you for . they are deciding between a circular pool with a 30-foot diameter and a 16 ft x 40 ft rectangular pool. the circular pool would have a 4-foot walkway all the way around it, and the rectangular pool would have a 3-foot walkway all the way around it. the backyard measures 75 feet by 50 feet.

calculations for the area of the circular pool with the 4-foot walkway.
calculations for the area of the rectangular pool with the 3-foot walkway.
calculations for determining how much grassy area is available with the circular pool.
calculations for determining how much grassy area is available with the rectangular pool.