P(-2, -5), Q(-6, -5), and R(-6, -2) are three vertices of rectangle PQRS. The coordinates of vertex S are ( ). The area of rectangle PQRS is square units.

There are 18 female students and 16 male students in a class. which of the following expresses the ratio of female students to male students in simplest form? а) 10 b) 9 to 8 c) 8: 9 d)18/16