Please help I need the answers and please show your work so I can give you braneist

Need on this geometry question. explain how you did it.

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64