Nested Circle and Square

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In the figure above, points A, B, C, D, E and F lie on a line. If point A lies on the square, point B lies on the circle, point C bisects AF, point D is the center of the circle, point E bisects DF, and point F lies on the circle and on the square, what is the difference in area between the square and the circle?

(1) and .

(2) and .