Arectangular window is topped with a semicircle on top. the height of the rectangular part is 1 more than 3 times its width , w meters which function represents the total area? a.) a(w) = w(1 + 3w) + pi(w/2)^2 b.) a(w) = w(1 + 3w) + pi(w/2)^2/2 c.) a(w) = w(1 + 3w) + pi(w)^2/2 d.) a(w) = w(1 + 3w) + pi(w)^2

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.