Pls help me with increasing and decreasing

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Find the sixth term of the following geometric sequence.