The number of octahedral and terhedral sides in a cubical closed packed array of `N` spheres respectively is

The number of octahedral sites in a cubical close pack array of N spheres is

The number of octahedral sites in a cubical close pack array of N spheres is

The number of octahedral sites in a cubical close pack array of N spheres is :

The numbers of tetrahedral and Octahedral holes per atom in cubical closest packings of atoms respectively are-

In aclosed packed array of N spheres ,the octahedral holes are :

The number of octahedral voids in a unit cell of cubic close packed structure is