How to get top 2 variance

[timhans]

Hello new to Crystal Reports.

I have a report based on a survey

I have tbl.Theme where there are 14 Themes under each theme there are questions.

I have the variance calculated for each theme, how do I either

1) Get the top 2 variance and the bottom 2 variance for all themes

2) Get all variance if greater then x.yz or less then a.bc

Thanks