15. Two masses of 3.1 kg and 4.6 kg are attached to either end of a thin, light rod (assume massless) of length 1.8 m. Compute the moment of inertia for:

a) The rod is rotated about its midpoint.

b) The rod is rotated at a point 0.30 m from the 3.1 kg mass.

c) The rod is rotated about the end where the 4.6 kg mass is located.