2. Solve Example 7.5-1, assuming that the objective function is given as

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(a) Maximize z = (3 + 3t)Xl + 2X2 + (5 - 6t)X3

(b) Maximize z = (3 - 2t)Xl + (2 + t)X2 + (5 + 2t)X3

(c) Maximize z = (3 + t)Xl + (2 + 2t)X2 + (5 - t)X3