How are $XeO_3$ and $XeOF_4$ prepared?

(N/A) $(i)$ $XeO_3$ can be prepared by the hydrolysis of $XeF_4$ or $XeF_6$:
$6XeF_4 + 12H_2O \longrightarrow 4Xe + 2XeO_3 + 24HF + 3O_2$
$XeF_6 + 3H_2O \longrightarrow XeO_3 + 6HF$
$(ii)$ $XeOF_4$ can be prepared by the partial hydrolysis of $XeF_6$:
$XeF_6 + H_2O \longrightarrow XeOF_4 + 2HF$