List point coordinates for atoms found in the FCC unit cell below that are labeled with the following numbers: $,,$ and $.$ Represent fractional indices as decimals.List point coordinates for atoms found in the FCC unit cell below that are labeled with the following numbers: $4,7,$ and $12.$ Represent fractional indices as decimals.

$($a$)$ Write the coordinate indices for the atom labelled with the number $4.$

$q$

$r$

$s$ :

$($b$)$ Write the coordinate indices for the atom labelled with the number $7.$

$q$

$r$

$s$ :

$($c$)$ Write the coordinate indices for the atom labelled with the number $12.$

$q$ :

$r$ :

$s$

$1$