The figure below is made up of one big circle, two identical medium circles and two identical small circles. The ratio of the radius of the small circle to the radius of the medium circle is 2 : 3.
(A) What is the total area of the unshaded part in the figure?
(B) What fraction of the big circle is shaded?
----------(A)--------------(B)
A144 π cm2--------5/18
B104 π cm2--------5/18
C104 π cm2--------13/18
D144 π cm2--------13/18