Three discs each of mass M and radius R are placed in contact with each other as shown in figure here. Then the MI of the system about an axis XX' is

Three rings each of mass M and radius R are placed in contact with each other as shown . Then MI of the system about YY' axis is

Thee spheres each of mass M and radius R are placed in contact with each other as shown in the figure here. Then the moment of inertia of the system about the axis CC' is

Three solid spheres of mass M and radius R are placed in contact as shown in figure. Find the potential energy of the system ?

Three solid sphere of mass M and radius R are placed in contact as shown in figure. Find the potential energy of the system ?

Three solid sphere of mass M and radius R are placed in contact as shown in figure. Find the potential energy of the system ?

Three identical solid discs, each of mass M and radius R, are arranged as shown in figure. The moment of inertia of the system about an axis AB will be