$($c$)$ Identify the optimal extreme point. What is the optimal solution?

$(A,B)=()$

$($d$)$ Which constraints are binding? Explain.

The optimal solution occurs at the intersection of constraints $,$ so these are the binding constraints.

$($e$)$ How much slack or surplus is associated with the nonbinding constraint?

Constraint is the nonbinding constraint. There is a Jof associated with this constraint.