The perimeter of a rectangle is 16 inches. The equation that represents the perimeter of the rectangle is 212w 16, where I represents the length of the rectangle and w represents the width of the rectangle. Which value is possible for the length
of the rectangle?
07 in
8 in
9 in
10 in

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.