Suppose $\displaystyle{f(x) = \left\lbrace \begin{array}{ll} x^2+8x+21, & x < -4, \\ -2, & x = -4, \\ -x^2-8x-11, & x > -4. \end{array} \right.}$ Evaluate the following limits (with a function of $x$ in the first answer blank and the value of the limit in the second answer blank) and evaluate the function.

1. $\displaystyle{\lim_{x\to -4^{-}} f(x) = \lim_{x\to -4^{-}} }$ $=$ .
2. $\displaystyle{\lim_{x\to -4^{+}} f(x)= \lim_{x\to -4^{+}} }$ $=$ .
3. $\displaystyle{f(-4)=}$ .