For the following linear programming problem
Max Z
−2x1 + x2 − x3
s.t.
2x1 + x2 ≤ 7
1x1 + x2 + x3 ≥ 4
the final tableau is 
a.Find the range of optimality for c1, c2 , c3. c4, c5 , and c6.
b.Find the range of feasibility for b1, and b2.
Definitions:
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The process of selecting among various alternatives based on the analysis and evaluation of available information.
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A preliminary version of a product that demonstrates its functionality and features, often used for testing and feedback.
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Abstract or physical representations used by engineers to test, analyze, and solve complex problems.
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