The coordinates below are the three vertices of a rectangle. Identify the fourth coordinate and the area of the rectangle. A coordinate plane with the following points A at negative 2, 2; B at negative 2, negative 4; and C at 2, negative 4.

(2, 1), 24 units squared
(2, 1), 20 units squared
(2, 2), 24 units squared
(2, 2), 20 units squared