Let F be the function below.

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Evaluate each of the following expressions.

Note: Enter 'DNE' if the limit does not exist or is not defined.

a) $\displaystyle \lim_{x \to -1^-} F(x)$ =   $\displaystyle \lim_{x \to -1^+} F(x)$ =   $\displaystyle \lim_{x \to -1} F(x)$ =   $F(-1)$ =

b) $\displaystyle \lim_{x \to 1^-} F(x)$ =   $\displaystyle \lim_{x \to 1^+} F(x)$ =   $\displaystyle \lim_{x \to 1} F(x)$ =   $F(1)$ =

c) $\displaystyle \lim_{x \to 3^-} F(x)$ =   $\displaystyle \lim_{x \to 3^+} F(x)$ =   $\displaystyle \lim_{x \to 3} F(x)$ =   $F(3)$ =