(i will make you the brainlest) a group of kids just finished trick-or-treating. the number of pieces of candy collected by each kid is listed below 47,35,32,41,30 find the mean number of pieces of candy.

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.