Hugo is saving for a baseball glove. he saves $10 the first week, and $6 each week for the next 6 weeks. the expression 10+6*2 represents the total amount in dollars he has saved. what is the total amount hugo has saved?its worth a lot of points

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.