4. When solving a linear programming problem which involves Maximizing z = 3x₁ + 2x2 - 2x6, the following tableau is generated but some of its entries are missing. 23 24 IS 16 XB 0 23/4 1 5/4 -5/4-1/2 15/4 0-1/2 1-1/2 1/2 0 5/2 0-9/4 0 1/4-1/4 1/2 15/4 71 72 0 0 1 E IT What should be the value of E which appears in the objective row? (a) 0 (c)-1/4 (b) 1/4 (d) -7/4 (e)-51/4 (f) None of the options

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