The graph of the function $f(x)$ is shown below darr.

For A$.-$C$.,$ give your answers as a list of one or more of the given numbers, or write NONE.

A$.$ At which of the values $a=1,2,3,4,5$ is $f(a)$ undefined?

B$.$ For which of the values $a=1,2,3,4,5$ is $f(x)$ continuous at $x=a?$

C$.$ For which of the values $a=1,2,3,4,5$ is $f(a)=\underset{x{a}^{-}}{lim}f(x)?$

For D$.-$G$.,$ use the graph of the function $f(x)$ to evaluate each of the expressions below. If a limit diverges to $$ or $-$ or if the limit does not exist for any other reason, write DNE.

D$.\underset{x5}{lim}f(x)=$

E$.\underset{x3}{lim}f(x)=$ F$.\underset{x0}{lim}f(4+|x|)=$

G$.\underset{h0}{lim}\frac{f(4\mathrm{.}25+h)-f(4\mathrm{.}25)}{h}=($Hint: think of the slope at $4\mathrm{.}25,$ since this is $f^{\text{'}}(4\mathrm{.}25)).$