The graph of f\displaystyle {f} is given below:

Answer the following questions about the graph of f′′\displaystyle {f}{''} based on the graph of f\displaystyle {f} above.

A) State the x−values over which f′′\displaystyle {f}{''} is positive.  

B) State the x−values over which f′′\displaystyle {f}{''} is negative.  

C) State the x−values over which f′′\displaystyle {f}{''} is zero.  

D) State the x−values over which f′′\displaystyle {f}{''} is undefined.  

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