HCP unit cell number of atoms

Choose the correct options: For a hcp unit cell, the number of atoms per unit cell is 6/4.

In a body centred unit cell, the number of atoms present is

Calculate the number of atoms per unit cell of CCP.

Calculate the number of atoms per unit cell of FCC.

In a HCP unit-cell, if total number of atoms per unit cell gets halved, then what is the percentage void in unit cell ?

In a HCP unit-cell, if total number of atoms per unit cell gets halved, then what is the percentage void in unit cell ?

In a simple or primitive unit cell, what is the number of atoms per unit cell ?

If the total number of atoms per unit cell is 2, the unit cell is