Minimize c = 2x + 2y + 3z subject to x      +  z ≥ 140 2x  +  y     ≥ 70     y  +  z ≥ 70 x ≥ 0, y ≥ 0, z ≥ 0. c= (x, y, z) =

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A: Let us first find the feasible region.

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