Excel IF statement less than , between and greater than

I'm trying to write a query that returns a specific value based on an IF.

I've tried using the below to help me but just get errors

Stack OverFlow 15753961

Basically what I'm trying to do is

=IF(F6 < 10000 THEN "SmallTrack" WHEN BETWEEN 10000 AND 25000 THEN "FastTrack" ELSE "MultiTrack")

But obviously in excel language. Cells would contain numbers from 1 to 50000.