$\text { Find the average value of the function } f ( x ) = 48 - 12 x ^ { 2 } \text { over the interval } - 5 \leq s \leq 5 \text {. }$

Multiple Choice

$\text { Find the average value of the function } f ( x ) = 48 - 12 x ^ { 2 } \text { over the interval } - 5 \leq s \leq 5 \text {. }$

A) $- 152$
B) $- 52$
C) 148
D) 248
E) $- 252$