Q3. The River City Police Department uses work shifts in which officers work 5 of the 7 days of the week with 2 successive days off. For example, a shift might work Sunday through Thursday and then have Friday and Saturday off. A total of 6 officers must be on duty Monday, Tuesday, Wednesday, and Thursday; 10 are required on Friday and Saturday; and 8 are needed on Sunday. River City wants to meet these staffing needs with the minimum total number of officers. Formulate a shift scheduling LP model to select an optimal staffing plan.