Sketch the graph of the function \( f(x)=\left\{\begin{array}{l}0 \text { if } x<-4 \\ 4 \text { if }-4 \leq x<4 \\ 8-x \text { if } 4 \leq x<10 \\ -2 \text { if } x \geq 10\end{array}\right. \)
Let \( g(x)=\int_{-4}^{x} f(t) d t \).
(a) Then \( g(-6)= \) \( \square \) \( g(0)= \) \( \square \) \( g(4)= \) \( \square \) \( g(8)= \) \( \square \) \( g(10)= \) \( \square \) , and \( g(12)= \) \( \square \) .
(b) \( g \) is increasing on the interval \( (A, B) \) where \( A= \) \( \square \) and \( B= \) \( \square \) \( ? \).
(c) \( g \) has a maximum value at \( x= \) \( \square \) \( ? \).