I need help PLEASE help mel

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.

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy

Find the solution on the interval [0, 2pi)