Shown below is the graph of $y=f'(x)$, NOT the graph of $y=f(x)$. (Click on the picture for a better view.)

From the information in this graph we can conclude that a good approximation to $f(-4.93)-f(-5)$ is

Shown below is the graph of a different function, $y=g(x)$. (Click on the picture for a better view.) Indicate the labeled point at which
$g(x)$ changes sign:
$g'(x)$ changes sign:
$g''(x)$ changes sign: