[samiam]

   
Because Xe is lower than group 3 it can have an expanded octet so in my head I can think of it having 1.  a structure with single bonds with oxygen and a lone pair on Xe.

2. one double bond with oxygen   3. one double bond with one oxygen in different location  4. double bond with oxygen in different location.
so initially i thought 4 was the answer but it is not.

5. one triple bond with one oxygen   6. triple bond with oxygen in different location   7. triple bond with oxygen in different location..

now is  this it.. or can it form like 2 double bonds at same time 3 double bonds at same time, 2 triple bonds at same time 3 triple bonds at same time.
plus you have to consider different locations so this would lead to a lot...