Consider the following covalent compounds in their solid state and find the value of expression (X+Y+Z) .
N2O5 , Cl2O6 , PCl5 , I2Cl6 , XeF6 , PBr5
Where X=Total number of compounds in which central atom of cationic or anionic part is sp3 hybridizedY=Total number of compounds having 90∘ bond angle either in cationic or anionic part.Z=Total number of compounds having 109∘28′ bond angle either in cationic or anionic part.