The sum of the number of lone pairs of electrons on each central atom in the following species is

$[\mathrm{T}\mathrm{e}\mathrm{B}{\mathrm{r}}_6{]}^{2-},[\mathrm{B}\mathrm{r}{\mathrm{F}}_2{]}^{+}$ and $[\mathrm{X}\mathrm{e}{\mathrm{F}}_3{]}^{-}$

(Atomic number: $\mathrm{F}=9, \mathrm{Br}=35, \mathrm{Te}=52, \mathrm{Xe}=54$)

A list of species having the formula $\mathrm{X}{\mathrm{Z}}_4$ is given below.

$\mathrm{X}\mathrm{e}{\mathrm{F}}_4,\mathrm{S}{\mathrm{F}}_4,\mathrm{S}\mathrm{i}{\mathrm{F}}_4,\mathrm{B}{\mathrm{F}}_4^{-},\mathrm{B}\mathrm{r}{\mathrm{F}}_4^{-},{\left[\mathrm{C}\mathrm{u}{\left(\mathrm{N}{\mathrm{H}}_3\right)}_4\right]}^{2+},{\left[\mathrm{F}\mathrm{e}\mathrm{C}{\mathrm{l}}_4\right]}^{2-},{\left[\mathrm{C}\mathrm{o}\mathrm{C}{\mathrm{l}}_4\right]}^{2-}$ and ${\left[\mathrm{P}\mathrm{t}\mathrm{C}{\mathrm{l}}_4\right]}^{2-}$

Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is