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Given an int variable n that has been initialized to a positive value and, in addition, int variables k and total that have already been declared, use a while loop to compute the sum of the cubes of the first n counting numbers, and store this value in total. Thus if n equals 4, your code should put 111 + 222 + 333 + 444 into total. Use no variables other than n, k, and total. Do NOT modify n.