For each piecewise function, find the specified function values.
$$
\begin{aligned}
&f(x)=\left\{\begin{array}{ll}
-5 x-8, & \text { for } x<-2 \\
\frac{1}{2} x+5, & \text { for }-2 \leq x \leq 4 \\
10-2 x, & \text { for } x>4
\end{array}\right.\\
&f(-4), f(-2), f(4), \text { and } f(6)
\end{aligned}
$$