Is the appropriate compound or just formulated compute the balance in the account after the stated. Of time $8,000 invested for 17 years with an APR 4% and monthly compounding the balance in the account after 17 years 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.