How many lattice points are there in one unit cell of each of the following lattices?
$(i)$ Face-centred cubic
$(ii)$ Face-centred tetragonal
$(iii)$ Body-centred

(N/A) $(i)$ There are $14$ lattice points in a face-centred cubic unit cell ($8$ from the corners $+ 6$ from the faces).
$(ii)$ There are $14$ lattice points in a face-centred tetragonal unit cell ($8$ from the corners $+ 6$ from the faces).
$(iii)$ There are $9$ lattice points in a body-centred unit cell ($1$ from the centre $+ 8$ from the corners).