What is the coordination number of a cation in an ionic compound if the type of hole occupied by the cation is cubic?

$A$ crystal is made up of metal ions $M_1$ and $M_2$ and oxide ions. Oxide ions form a $ccp$ lattice structure. The cation $M_1$ occupies $50 \%$ of octahedral voids and the cation $M_2$ occupies $12.5 \%$ of tetrahedral voids of the oxide lattice. The oxidation numbers of $M_1$ and $M_2$ are,respectively:

The structure of $ZnS$ is

The number of atoms/molecules contained in one body-centered cubic unit cell is

In a face-centered cubic lattice,a unit cell is shared equally by how many unit cells?

The $Ca^{2+}$ and $F^{-}$ ions are located in $CaF_2$ crystal,respectively,at face-centered cubic lattice points and in