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Exercises 1 - 4 give initial and final tableaus. Find the ranges over which you can vary each cost coefficient individually without changing the solution. 1. Initial Tableau X1 X3 X4 *'s X6 X7 Xg 10 -16 161 Oo X6 X5 X2 10 at www 0 1 0 1 0 1 0 0 86 1 ON } 48 137 0 ) - 1 1 0 0 - 1 -4 111