For the following linear programming problem
Max Z ?2x1 + x2 ? x3
s.t. 2x1 + x2 ? 7
1x1 + x2 + x3 ? 4
a. Find the range of optimality for c1, c2, c3, c4, c5, and c6.
b. Find the range of feasibility for b1 and b2.
a. c1 ? 2
0 ? c2
c3 ? 0
c4 ? 1
?1 ? c5 ? 1
c6 ? 0
b. 4 ? b1
b2 ? 7
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