For additional help check out these videos:
http://www.youtube.com/watch?v=bGNMXfaNR5Q
http://www.youtube.com/watch?v=xYOrYLq3fE0
Can MVT prove you were speeding?
http://www.youtube.com/watch?v=N2wHFshpDL4
HW: Complete WS 3.2 Mean Value Theorem and yesterday's WS Conditions for using the MVT.