Serving size of five cookies contains 9 g of fat, 16 g of carbohydrates, and 2 g of protein. If walking 1 mile consumes 170 kJ of energy, how many miles must you walk to burn off enough calories to eat five cookies? Assume the energy content of fats, carbohydrates, and proteins are 8 kcal/g, 4 kcal/g, and 4 kcal/g, respectively. 1 cal = 4.184 J.

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