The sides of a triangle are 8 cm, 15 cm, and 17 cm respectively. At each of its vertices, circles of radius 3.5 cm are drawn. What is the area of the triangle excluding the portion covered by the sectors of the circles $$(\pi=\frac{22}{7})$$ ?

A

$$21.5\ cm^{2}$$

B

$$47\ cm^{2}$$

C

$$23.5\ cm^{2}$$

D

$$40.75\ cm^{2}$$