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.

Calculate the number of atoms per unit cell of BCC.

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 ?

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