We have 3 workgroups, which can work 8 hours each. They have to manage 7 orders which take 2,2,11,2,1,3, and 2 hours to be finished. Moreover, every workgroup has its own abilities, which means that the first workgroup can work on order 3,4,5 and 6, the second on 1,2,3,5,6 and 7, and the third on 1,2,3 and 5. 1. Define the Decision Variables and solve it using Excel solver (2) 2. What is the interpretation of shadow prices associated with the flow constraints (2)