**Production and Operations Analysis Textbook - Chapter 11, #32)

An industrial park consists of 8 buildings. The corporations in the park are sharing the cost of construction and maintenance for a new first-aid center. Because of the park's layout, distances between buildings are most closely approximated by a rectilinear distance measure. Weights for the buildings are determined based on the frequency of accidents. Find the optimal location of the first aid center to minimize the weighted sum of the rectilinear distances to the 8 buildings. Building 1 2 3 4 a 0 10 b; 0 3 W 9 7 4 3 8 12 8 20 5 6 7 4 18 9 16 2 12 4 1 4 8 5 3 5