You draw three cards from a deck of 52 cards, replacing the drawn card and re-shuffling the deck between each draw. What is the probability that you will draw a spade at least once? The answer is approximated.

42%

18%

58%

83%

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.