In a network flow problem, ________ connect nodes and show flow from one point to another

Fred, a department manager, is attending the monthly budget planning meeting, where all the department managers report on their current status. Both before and after his own presentation, he sits forward in his chair and makes eye contact with all the other managers as they present. He asks questions and nods his head after their responses. He is exhibiting the ________ style of listening.

A. Involved B. Passive C. Active D. Immediate E. Detached

As long as the slope of the objective function stays between ________ and ________, the current optimal solution point will remain optimal

In a linear programming problem, the binding constraints for the optimal solution are: 5x1 + 3x2 ? 30 2x1 + 5x2 ? 20