How do I convert frequency to data capacity?
Not one to usually use this site, but I think we are in the same class and I stumbled upon your question with a google search. 
If you check out this http://home.ubalt.edu/abento/650/physicaldlink/sld032.htm 
then you should get a bit closer to the answer. 
Tip- think of s as frequency with the formula b = s x n