Crystal lattices and unit cells

A compound $\ce{M_pX_q}$ has cubic close packing (ccp) arrangement of X. Its unit cell structure is shown below. The empirical formula of the compound is

The number of hexagonal faces that are present in a truncated octahedron is

The number of atoms in this HCP unit cell is

The volume of this HCP unit cell is

Match the crystal system/unit cells mentioned in Column I with their characteristic features mentioned in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.