Licence for progress

HI
Does any one know how licensing works for progres? Do we need
seperate licence for Report builder, Progres results?
If we have 5 licence for Vantage application and all the 5 users are
working on vnatge how many people work on report builder at the same
time.
these licences are to use the application or to connect to vantage?
I am confused here. Please explain.