1- A call center has the following work load Day Full Time Equivalent (FTE) required S 11 M 17 T 13 W 15 Th 19 F 14 S 16 A FTE represents 8 hours/day. The call center may meet its daily labor requirements with a combination of full-time and part-time employees. Both work 5 consecutive days per week. Full time employees work 8 hours/day at a rate of 25 LE/hour while part-time employees work 4 hours/day at a rate of 20 LE/hour. Agreements with the union limit the composition of part-time labor to 25% of labor requirements. Develop an optimization model to minimize the cost of staffing the call center.