Arslan,
I apologize! I didn't realize that you had the 3rd edition.
Please also disregard the abbreviations of the contracts that I mentioned earlier. They are from the 4th edition.
So under this light, you are right that FP = low, TM = medium and CR = high from the buyers perspective.
You can also read the following article - they explain each contract type and the risk involved:
zo-d.com/blog/archives/taking-the-pmp-ex...-contract-types.html