Solve fast I needed very urgent answer

Six, small, identical putty each weighing 2.25 [kg], are placed on the corners of a massless, uniform and flat piece of wood shaped as a regular hexagon with side length 1.20 [m]. What is this system's moment of inertia if the system is made to rotate about an axis perpendicular and passing through

A. the wood's geometric center?

B. one of the corners of the wood?