I would like to ask about the graph provided for the answer of Q8(b).  Shouldn't the curve touch the x-axis at r=c?

Thank you very much for your correction.  The graph has been replaced.  John

Does anyone have solutions to the FRQs rather than just answers?  I am making a mistake somewhere and cannot find it.

Kim, we can provide individual solutions but we don't supply answers to all the FRQs. But please let me know which problem isn't working for you, and I'll either see what you've done and help, or provide you with the written out solution.  John