Please answer the question in the screenshot and show all your work. Thank you!

11. The city of Waupaca, Wisconsin wants to drain and fill Pine Lake, shown below. The lake averages 8 feet deep. About how many cubic yards of dirt will it take to fill the area after the lake is drained? Pine Lake Camp N Pine Lake Rd (Crossway's Camping.. he take Ad W Pine Lake Ad K N Pine Lake Ad 940 feet N Pine Lake Ln 885 feet pine Lake 675 feet 960 feet w Pine Lake Rid 950 feet K 705 feet 700 feet 650 feet Bradley Rd 625 feet W Pine Lake Ad Echo Lake Rd HORIZONTAL SPACING : 500 FEET