The graph of g\displaystyle {g}' is given below:

Notice this is the graph of the derivative of g\displaystyle {g} not the graph of g\displaystyle {g} itself. Answer the following questions about the graph of g\displaystyle {g}{''} based on the graph of g\displaystyle {g}' above.

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

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

C) State the interval over which g\displaystyle {g}{'''} is zero.   Are there any other values where g\displaystyle {g}{'''} is zero?  

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