Juanita Flores schedules volunteers (Denzel, Ronnell, Rosanne, Napoleon, Barry, and Rosemary) at the Pueblo, Colorado, Free Food Pantry, which is open from 5 to 9 p.m., 7 days a week. She wants a schedule so that each volunteer has 4 days on and 3 consecutive days off. Note that the rules in Example 8 now apply to 3 consecutive days off.

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DAY MON. TUE. WED. 4 3 Volunteers 3 needed THU. FRI. SAT. 3 5 2 SUN. 3