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Attached is the chart that corresponds to the question.

Attached is the chart that corresponds to the question.  
1. The Hardrock Concrete Co has plants in three locations and is currently working on 3 major construction projects, each located at a different site. The shipping cost per truckload of concrete, daily plant capacities and daily project requirements are provided in the table above.
(a) formulate an initial feasible solution to Hardrock's transportation problem using Northwest corner rule. Then evaluate each unused shipping route by computing all improvement indices. Is this solution optimal? Why?
(b) Is there more than one optimal solution to this problem? Why?

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