Question: 12. Consider the network below. A modeler has formulated an LP for finding the shortest path from node I to node 7 10 8 6

12. Consider the network below. A modeler has

12. Consider the network below. A modeler has formulated an LP for finding the shortest path from node I to node 7 10 8 6 4 3 12 3 3 9 6 Min 10X12 + 12x + 4X + 8X3 + 7X: +9X3 + 4x + 3X + 6X6 + 8 + 7X3, + 3X54 + 4X + 9x + 3X sit. 6) - =1 -X12 + X+ X - XX-X =0 (1) -X1 + Xis + X36 - Xu - X 30 (1) -X4X +5 +X - Xe =0 (iv) -Xos - X - X + Xs2 + Xu + X = 0 (V) - -Xy + Xos + X7 = 0 (vi) X47 + X + X6 =0 X, 20 for all i andi (vi) Find which equation is not a valid constraint equation: (A) i B) i v (D) vii (E) vii will be 13. Due to a calamity, route 5-7 is no longer available. The constraint equation number ------- changed to to reflect the changed situation (A) i, and -13 + Xys + Xx - XS - X = 0

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