3. The city of Dakota Heights wants to determine where to locate postal substations so as to minimize the construction cost while servicing every postal zone. The city has been divided into twelve postal zones. Six possible locations for the substations have been identified. The cost of building at each location and the districts the location can service appear in the table below. LocationCost Zones that can be serviced

1. $52,000 1,2,3,11,12

2. $42,000 1,4,6,11

3. $47,000 2,4,5,8,10

4. $49,000 3,5,6,7,9

5. $38,000 4,6,7,8

6. $64,000 9,10,11,12

Is this problem an Allocation, Covering, Blending, Product Portfolio, Production Planning, or Data Envelope Analysis problem? Explain your answer in a few short sentences