Network design optimization models are used to ______________. Group of answer choices Minimize total facilities and transportation costs by locating facilities, assigning capacity to each facility, and developing a plan to transport units. Minimize delivery costs by optimizing the routes taken by delivery trucks when conducting a milk run. Minimize production costs by determining a plan for hiring full-time and part-time employees. Minimize workforce costs by scheduling employees to their shifts and assign employees to sales territories. Maximize customer demand while minimizing idle capacity