Webster is planting a new tree in his yard. Below is a dia team of the current layout of the yard, where each wuare is I yard. The new tree
has a diameter of 2 yards and can not overlap or touch any of the existing features
Oak
Cardel
Which of the following locations could the new tree be planted Select all that apply

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.