How many total constituent particles are present in a simple cubic unit cell?

In a solid $AB$,$A$ atoms are in $ccp$ arrangement and $B$ atoms occupy all the octahedral sites. If two atoms from the opposite faces are removed,then the resultant stoichiometry of the compound is $A_{x} B_{y}$. The value of $x$ is ..... [nearest integer]

What is the total number of atoms present in an $fcc$ unit cell?

Copper crystallises in a face-centred cubic lattice with a unit cell length of $361 \text{ pm}$. What is the radius of copper atom in $\text{pm}$?

In a cubic structure,$W$ atoms are present at the corners of the unit cell,$O$ atoms are at the edge centers,and $Na$ atoms are at the center of the cube. What is the formula of the compound?

Which of the following expressions is correct in the case of a $CsCl$ unit cell (edge length '$a$')?