Which of the following reactions does not involve the liberation of oxygen?

Which of the following noble gases is most soluble in water?

$Xe + 2F_2 \xrightarrow{573 \ K, \ 60.70 \ bar} A$
What is $A$?

What is the trend in the atomic radii of noble gases as we move down the group?

Under ambient conditions,the total number of gases released as products in the final step of the reaction scheme shown below is:

$Xe_{(g)} + 3F_{2(g)} \xrightarrow{573 \ K, 60-70 \ bar} XeF_{6(s)}$ ($1:20$ molar ratio).
$XeF_6 + H_2O \rightarrow XeOF_4 + 2HF$ $(Y)$
$XeF_6 + 3H_2O \rightarrow XeO_3 + 6HF$ $(Z)$
The correct statements regarding $Y$ and $Z$ are:
$I$. $Y$ has square pyramidal geometry
$II$. $Y$ has linear geometry
$III$. $Z$ has $3 \sigma, 3 \pi$ bonds and $1$ lone pair of electrons on the central atom
$IV$. $Z$ has tetrahedral geometry