Coordination numbers of $Zn^{2+}$ and $S^{2-}$ in the crystal structure of wurtzite are

The number of octahedral voids in a unit cell of a cubical closest packed structure is

$A$ compound is formed by elements $A$ and $B$. Atoms of $A$ are present at the corners of the cube,and atoms of $B$ are present at the body center. What is the formula of the compound?

The unit cell of a $NaCl$ lattice:

Identify the type of unit cell that has particles at the centre of each face in addition to the particles at eight corners of a cube?

$A$ compound formed by elements $X$ and $Y$ crystallises in a cubic structure, where $X$ atoms are at the corners of a cube and $Y$ atoms are at the body centre. The formula of the compound is: