Which crews are assigned to work

Crew 1 will ( be assigned/ not be assigned)

Crew 2 will ( be assigned/ not be assigned)

Crew 3 will ( be assigned/ not be assigned)

Crew 4 will ( be assigned/ not be assigned)

Crew 5 will ( be assigned/ not be assigned)

Crew 6 will ( be assigned/ not be assigned)

Crew 7 will ( be assigned/ not be assigned)

Crew 8 will ( be assigned/ not be assigned)

The university is scheduling cleaning crews for its ten buildings. Each crew has a different cost and is qualified to clean only certain buildings. There are eight possible crews to choose from in this case. The goal is to minimize costs while making sure that each building is cleaned. The management science department formulated the following linear programming model to help with the selection process. Wis 200x1+250x2+225x3+190x4+215x5+245x6+235x7+220x8 5. t. x1+x2+x5+x71 BBuilding A constraint\} x1+x2+x31 [Building B constraint\} x6+x81 [Building C constraint } x1+x4+x71 Building D constraint } x2+x71 [Building E constraint\} x3+x81 [Building F constraint\} x2+x5+x71 Building G constraint } x1+x4+x61 [Building H constraint } x1+x6+x81 (Building constraint\} x1+x2+x71 Building J constraint } xj={1,ifcrewjisselected0,otherwise Set up the problem in Excel and find the optimal solution. a. What is the cost of the optimal crew assignment