Pregunta 17 2 pts The sensitivity range for an objective function coefficient is the range within which the optimal values of the decision variables do not change, but the value of Z could be different. O True O False Pregunta 18 2 pts The simplex method moves from one solution to another, better solution, until it finds the optimal one and then stops. O True False Pregunta 19 2 pts Slack variables are added to constraints and represent unused resources. O True O False u Pregunta 20 2 pts The reduced cost of a basic decision variable is O. O True O False