Question$$f(x)=\frac{x^{2}-13 x+36}{x-4}$$ (a) Explain why $f$ has a removable discontinuity at $x=4$. (Select all that apply.) $f(4)$ is undefined. $f(4)$ and $\lim _{x \rightarrow 4} f(x)$ are finite, but are not equal. $\lim _{x \rightarrow 4} f(x)$ does not exists. $\lim _{x \rightarrow 4} f(x)$ is finite. none of the above