The twice-differentiable functions $f$ and $g$ are defined for all real numbers $x$. Values of $f$, $f ^ { \prime }$, $g$, and $g ^ { \prime }$ for various values of $x$ are given in the table below.
| $x$ | -2 | $- 2 < x < - 1$ | -1 | $- 1 < x < 1$ | 1 | $1 < x < 3$ | 3 |
| $f ( x )$ | 12 | Positive | 8 | Positive | 2 | Positive | 7 |
| $f ^ { \prime } ( x )$ | -5 | Negative | 0 | Negative | 0 | Positive | $\frac { 1 } { 2 }$ |
| $g ( x )$ | -1 | Negative | 0 | Positive | 3 | Positive | 1 |
| $g ^ { \prime } ( x )$ | 2 | Positive | $\frac { 3 } { 2 }$ | Positive | 0 | Negative | -2 |
(a) Find the $x$-coordinate of each relative minimum of $f$ on the interval $[ - 2, 3 ]$. Justify your answers.
(b) Explain why there must be a value $c$, for $- 1 < c < 1$, such that $f ^ { \prime \prime } ( c ) = 0$.
(c) The function $h$ is defined by $h ( x ) = \ln ( f ( x ) )$. Find $h ^ { \prime } ( 3 )$. Show the computations that lead to your answer.
(d) Evaluate $\displaystyle\int _ { - 2 } ^ { 3 } f ^ { \prime } ( g ( x ) ) g ^ { \prime } ( x ) \, dx$.