How are xenon fluorides `XeF_(2)`, `XeF_(4)` and `XeF_(6)` obtained?

In xenon fluorides most reactive in XeF_(6) , XeF_(4) and XeF_(2) is

Xenon tetrafluoride, XeF_(4) is:

If number of lone pairs on central atom in XeF_(2), XeF_(4) and XeF_(6) are x, y, z. What is the sum of x+y+z here?

The number of lone pairs on central atom in XeF_2, XeF_4 and XeF_6 are:

Draw the molecular structures of XeF_(2), XeF_(4) and XeO_(2)F_(2) , indicating the location of lone pair(s) of electrons.

Molecular shape of SF_(4), CF_(4) and XeF_(4) are

Why Xe does not from fluorides such as XeF, XeF_(3) or XeF_(5) ?

S_(1): Argon is used in arc welding of metals or alloys to provide an inert atomosphere. S_(2):" XeF_(2),XeF_(4) and XeF_(6) are colourless crystalline solids and sublime readily at 298K . S_(3):XeF_(2),XeF_(4) and XeF_(6) are readily hydrolysed. S_(4): Xenon fluorides react with flourine ion acceptor to form cationic species and fluoride ion donors to form fluoro anions.

In case of XeO_(2) F_(2) and XeF_(6) , Xe is with

Noble gases have completely filled valance shall i.e. ns^(2)np^(6) exceps He. Noble gases are monoatomic under normal conditions .Law boiling point of the ligher noble gases are due to weak vander walls forces between the atoms and absence of any interatomic interactions Xe reacts with F_(2) so give a source of flouoride mainly XeF_(2),XeF_(4),XeF_(4),XeF_(3) on complete hydrolyses gives XeF_(3) , Oxidation state of Xe in XeF_(2) is