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Two friends, Pamela and Elaine, compared snack items they planned to enjoy during a work break. Pamela's snack was a small bag of shortbread cookies composed of 2.5 grams fat, 18 grams carbohydrates, and 2.3 grams protein. Elaine had a bag of popcorn composed of 2.7 grams of fat, 29 grams of carbohydrates, and 3.6 grams protein. Nutrient: Fuel value (kJ/g) Carbohydrate: 17 Fat: 38 Protein: 17 (a) Using the fuel values provided, calculate the number of calories in each person's snack. Pamela's snack ___ Cal Elaine's snack ___ Cal (b) Suppose the friends took a 15-minute walk after snacking. If Pamela burned 45 calories and Elaine expended 48 calories, who had the smaller net gain of calories after snacking and walking?