ocr: THE KNAPSACK PROBLEM Forj=1ton, the decision variable is defined by à IS included in knapsacks ifrequirement, J 11 otherwise. Thel Knapsack problem for Step 1 can be represented by PI Max Z-ZVA - subjcctto Eoaysh jel 200r1191..1 InP1 1 and Z0 - FH VA represent the optimal solution and optimaivalue: (maximum valuel respectively. The 0-1 integer problem (a variant of the knapsack problem) for Step 2 can be represented by P2. Min %-Eos iE subjectto Zyx-z e0orlJel.h InP2and 5-Facerepresent the optimal solution ando optimalvalue(minimumvalue,espectiwely,
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