Anthony Altino is mixing food for his young daughter and would like the meal to supply 1 gram of protein and 7 milligrams of iron. He is mixing together cereal, with 0.7 grams of protein and 1 milligram of iron per ounce, and fruit, with 0.5 grams of protein and 5 milligrams of iron per ounce. What mixture will provide the desired nutrition?

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