Question: what will be the answer? The American Parcel Service (APS) decided to remove the city of St. Louis from the analysis - this is regarding

what will be the answer? The American Parcel what will be the answer?

The American Parcel Service (APS) decided to remove the city of St. Louis from the analysis - this is regarding the "Set Covering" example discussed in class. After resolving the problem considering this new scenario in which APS has decided to not consider St. Louis as a possible city to construct the hub, which one of the following options is NOT correct? (hint: use the original excel file of this model and implement the changes, adjusting it in order to properly represent this new problem) The new model could be described as: Decision Variables: Xi = city i, i = 2 to 11; Xi = 0 if city is not selected as a hub and x; = 1 if it is. Model: Minimize Z = X1 +x2 + x3 + x4 + X5 + X6 + X7 + X8 + xy + X10 + X11 subject to: Atlanta: X1 + X3 + Xg 2 1 Boston: X2 + X9 2 1 Charlotte: X3 + X11 2 1 Cincinnati: X4 + X5 + X8 + X10 1 Detroit: X4 + X5 + X6 + X7 + X10 1 Indianapolis: X4 + X5 + X6 + X7 + Xg 2 1 Milwaukee: X5 + X6 + X7 2 1 Nashville: X4 + X6+Xg 2 1 New York: X2 + X9+ X11 > 1 Pittsburgh: X4 + X5 + X10 + X11 2 1 Richmond: X3 + Xo + X10 + X11 > 1 X; = 0 or 1 Boston will still be selected as a city to construct the hub. Nashville will still be selected as a city to construct the hub. Removing St Louis will change the final value of Z (the optimal Z). All of the above are correct

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