Let
f(x) = {
10 if x < -4
-x + 6 if -4 <= x < 1
9 if x = 1
6 if x > 1.
Sketch the graph of this function and find the following limits, if they exist.
(If a limit does not exist, enter DNE.)
1. lim_{x->-4^-} f(x)
2. lim_{x->-4^+} f(x)
3. lim_{x->-4} f(x)
4. lim_{x->1^-} f(x)
5. lim_{x->1^+} f(x)
6. lim_{x->1} f(x)