For the graph, answer parts $($a$)$ through $($e$)$ below.

$($a$)$ Determine the $x-$values where $f^{\text{'}}(x)=0.$ Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A$.$ The $x-$value$($s$)$ where $f^{\text{'}}(x)=0$ is$/$are $x=$

$($Type an integer or a decimal. Use a comma to separate answers as needed.$)$

B$.$ There are no $x-$values where $f^{\text{'}}(x)=0.$