Body centered cubic lattice has a coordination number of

If an atom is present in the centre of the cube,the participation of that atom per unit cell is

The coordination number of an atom in a body-centered cubic $(BCC)$ structure is:
[Assume that the lattice is made up of atoms.]

What is the total number of particles present in a $bcc$ unit cell?

In the face-centred cubic $(FCC)$ lattice structure of gold, the closest distance between gold atoms is ('a' being the edge length of the cubic unit cell).

Determine the number of atoms per unit cell in a body-centered cubic $(BCC)$ unit cell.