Rigid Body

Find the moment of inertia for the following bodies:
1. A cylinder of mass M radius R and height H rotating about its symmetry axis.
2. A cylinder of mass M radius R and height H rotating about an axis parallel to the symmetry axis and tangent to the surface.
3. A thin square of side L with its diagonal along x-axis (mass M). Find I_{xx}, I_{yy} and I_{zz}.