#### Answer

a. the denominator will be zero if $x=4$.
b. $2$.
c. $2$.

#### Work Step by Step

a. We can see that when $x=4$, $f(x)=\frac{0}{0}$, which is undefined. Thus, $f(x)$ is undefined because the denominator will be zero if $x=4$.
b. We can see from the table that when $x$ approaches $4$ from the left, $f(x)$ is getting closer to the integer $2$.
c. We can see from the table that when $x$ approaches $4$ from the right, $f(x)$ is getting closer to the same integer $2$.