Determine whether Rolle's theorem can be applied to $f$ on the closed interval $a,b.($Select all that apply.$)$

$f(x)=\frac{x^2-2x-3}{x+3},[-1,3]$

Yes, Rolle's theorem can be applied.

No$,$ because $f$ is not continuous on the closed interval $a,b.$

No$,$ because $f$ is not differentiable on the open interval $(a,b).$

No$,$ because $f(a)f(b).$

If Rolle's theorem can be applied, find all values of $c$ in the open interval $(a,b)$ such that $f^{\text{'}}(c)=0.($Enter your an

$c=$