Use the graph to find the following limits and function value for each value of a$.$

i$)\underset{x{a}^{-}}{lim}f(x)$ ii$)\underset{x{a}^{+}}{lim}f(x)$ iii$)\underset{xa}{lim}f(x)$ iv $f(a),$ if it exists.

a$.$ For $a=1$

b$.$ For $a=-1$

iii$)$ Select the correct choice below and fill in any answer boxes in your choice.

A$.\underset{x-1}{lim}f(x)=($Type an integer or a decimal.$)$

B$.$ The limit does not exist.

iv$)$ Select the correct choice below and fill in any answer boxes in your choice.

A$.f(-1)=($Type an integer or a decimal.$)$

B$.$ The answer is undefined.