Check for parameters in filters

[samcom]

Hi,
I have a Cognos (10.2) report that has 5 optional filters with parameters. I need to add additional filter to my report when users did not select any of the above 5 filters. Please suggest how to do it.

I have used below options in the query filter and no luck  :'(.
Ex (for 2 params):
1. If (?Param1? is null) Then (If (?Param2? is null) Then ( [Data1]> [data2]) Else (1=1)) Else (1=1)
2. If (Paramcount(?Param1?)=0) Then (If (Paramcount(?Param1?)=0) Then ( [Data1]> [data2]) Else (1=1)) Else (1=1)
3. If (coalesce(?Param1?,'1')='1') Then (If (coalesce(?Param2?,'1')='1') Then ( [Data1]> [data2]) Else (1=1)) Else (1=1)
4. Adding "If (?Param1? is null) Then ('A') Else ('B')" as dataitem is making the parameter mandatory.
5. Adding "If (?Param1? is null) Then ('A') Else ('B')" as calculated query is making the parameter mandatory.

Thanks,
Sam