Mario wants to make a patio in the shape of a right triangle. He creates a coordinate plot that represents his backyard, with each unit length equal to 1 foot. He wants one vertex at (2, 2) and a second vertex at (2, 8). He wants the area of the patio to be 18 square feet. Which of the following coordinates could give possible locations of the third vertex? Check all that are true.

(8, 8)

(8, 2)

(7, 4)

(8, 4)

(9, 8)