-Find $\frac { d } { d x } \left( x ^ { 2 } f ( x ) \right) \text { when } x = 4 \text {. }$

Multiple Choice

$\begin{array} { | r | c | c | c | c | } \hline x & f ( x ) & f ^ { \prime } ( x ) & g ( x ) & g ^ { \prime } ( x ) \\\hline - 6 & 7 & - 8 & - 6 & 7 \\- 4 & 1 & - 5 & 0 & 5 \\- 2 & 3 & - 2 & 4 & 3 \\0 & 5 & 0 & 6 & 1 \\2 & - 5 & 1 & 6 & - 1 \\4 & - 3 & 3 & 4 & - 3 \\6 & 1 & 5 & 0 & - 5 \\\hline\end{array}$
-Find $\frac { d } { d x } \left( x ^ { 2 } f ( x ) \right) \text { when } x = 4 \text {. }$

A) $- 24$

B) $- 18$
C) 0
D) 12
E) 24
F) 36
G) 48
H) 72