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**Im Stuck!!!!!!!!!**

I have a final exam coming up in my engineering calc class. I am at a loss for how to complete some of the 238570198437049870958273049875 problems he gave us for a review. I thought I did well on the exam covering the material but i got a 63. Apparently I am not understanding SOMETHING. These are the seven questions i missed on the exam...if ANYONE wants to give their imput on how to complete them in order for me to compare what i did, to the correct way to do it...id appreciate it.

1. locate the absolute extrema of the function y=x^2-2-cosx on the closed interval [1,3].

2. Using Rolle's Theorem, find all values of c for the function f(x)=cosx in the open interval [0,2pi] such that f ' (c)=0

3. Using the Mean Value Theorem find the values for c of the function f(x)=arctan(1-x), [0,1]

4. Find the critical numbers of f. find the open intervals on which the function is increasing or decreasing and locate all relative extrema. f(x)=[(x^3)/3]-lnx

5. consider the function on the interval (0,2pi). for the function f(x)=(sinx)/(1+cos^2x) a)find the open intervals on which the function is increasing or decreasing, b)apply the first derivative test to identify all relative extrema

6. find the points of inflection and discuss the concavity of the graph of the function f(x)=x^3(x-2)

7. find all relative extrema. use the second derivative test where applicable. f(x)=arcsin x - 2x