how to calculate coordinatation number in s.c , f.c.c and b.c.c

Q. The coordination number of BCC, SCC and FCC are:

Q. Assertion :In FCC, coordination number is eight. Reason: In FCC, arrangement of atoms is ABCABC type.

Q. Assertion: The packing efficiency is maximum for the fcc structure.

Reason: The coordination number is $12$ in fcc structures.

Q. The coordination number of an atom in a fcc lattice is _________.

Q. The coordination number of BCC, FCC, CCP, HCP