Slack variable on a constraint is normally for a resource is the different between resource used and resource available and it is added to the left side of the constrain. True False Question 12 1 pts Surplus variable on a resource or constraint is the different between amount required and excess amount produces and is added to the right side of the constraint. True False Question 13 1 pts Shadow price is also known as dual price. True False Question 14 1 pts Slack or surplus values can help you show the binding and non-binding constraints. True False