Consider the following version of Knapsack. Given are two weight limits W1 and W2, where W1 ≤ W2. Given are also n items (w1, c1),(w2, c2), . . . ,(wn, cn), where wi is the weight and ci the cost of the i-th item. We want to find a subset of these items of the highest cost, where the subset weights at least W1 and at most W2. Give an O(nW2) algorithm for this problem. (Recall that the cost (respectively weight) of a subset is the sum of the costs (respectively weights) of the items in the subset.)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider the following version of Knapsack. Given are two weight limits W1 and W2, where
W1 ≤ W2. Given are also n items (w1, c1),(w2, c2), . . . ,(wn, cn), where wi
is the weight and ci
the cost of the i-th item. We want to find a subset of these items of the highest cost, where
the subset weights at least W1 and at most W2. Give an O(nW2) algorithm for this problem.
(Recall that the cost (respectively weight) of a subset is the sum of the costs (respectively
weights) of the items in the subset.)

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This a dynamic programming problem where the solution to each possible subset is stored in OPT[i, j] (inside a 2D array). Can someone assist in helping me solve it this way?

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This a dynamic programming problem that utilizes a 2D array opt[i][j] and stores the sum of each possible subsets cost(this being the weight). Is it possible to get this question answered in java? 

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