Consider an ionic solid MX , with NaCl structure. Construct a new...

Consider an ionic solid $MX$, with $NaCl$ structure. Construct a new structure \left(Z\right)$, whose unit cell is constructed from the unit cell of$MX$, following the sequential instructions given below. Neglect the charge balance.<br />$( i )$Remove all the anions \left(X\right)$, except the central one.
$( ii )$ Replace all the face centered cations \left(M\right)$, by anions \left(X\right)$.
$( iii )$ Remove all the corner cations \left(M\right)$.<br />$( iv )$Replace the central anion \left(X\right)$, with cation \left(M\right)$.<br />The value of \left(\dfrac{numberofanions}{numberofcations}\right) in Z$ is _____.