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2. (20 points) Use branch and bound to solve the following binary knapsack problem. When there is a choice of hanging nodes to explore,

2. (20 points) Use branch and bound to solve the following binary knapsack problem. When there is a choice of hanging nodes to explore, use the Best First Search method. max x13x2+5x3 + 2x4 s.t. 2x14x2+7x3+6x4 12 X1, X2, X3, X3 {0,1} Include your branch and bound tree.

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