The graph of $f''$ is given in the figure below.
(Click on the graph for a larger version.)
Draw graphs of $f$ and $f'$, assuming both go through the origin, and use them to
complete the following statements (enter the $x$-values as $x_1, x_2$, etc.):
A. $f(x)$ is greatest at $x$ =
B. $f(x)$ is least at $x$ =
C. $f'(x)$ is greatest at $x$ =
D. $f'(x)$ is least at $x$ =
E. $f''(x)$ is greatest at $x$ =