The Clark County Sheriff's Department schedules police officers for 8 -hour shifts. The beginning times for the shifts are 

The Clark County Sheriff's Department schedules police officers for 8-hour shifts. The beginning times for the shifts are 8:00 a.m., noon, 4:00 p.m., 8:00 p.m., midnight, and 4:00 a.m. An officer beginning a shift at one of these times works for the next 8 hours. During normal weekday operations, the number of officers needed varies depending on the time of day. The department staffing guidelines require the following minimum number of officers on duty: Time of Day 8:00 a.m.-noon Noon-4:00 p.m. 4:00 p.m.-8:00 p.m. 8:00 p.m.-midnight Midnight-4:00 a.m. 4:00 a.m.-8:00 a.m. Minimum No. of Officers on Duty 5 6 9 7 4 6 Determine the number of police officers that should be scheduled to begin the 8-hour shifts at each of the six times to minimize the total number of officers required. If your answer is zero, enter "0". Starting Time 8:00 a.m. Noon 4:00 p.m. 8:00 p.m. Midnight 4:00 a.m. Officers Starting