a dietician works in a hospital and prepares meals under the guidance of a physician. suppose that for a particular patient, a physician prescribes a meal to have 550 calories, 40 g of protein, and 320 mg of vitamin c. the dietician decides to prepare the meal using steak (each 3-oz serving contains 300 cal, 20 g of protein, and no vitamin c), baked potatoes (one baked potato contains 100 cal, 5 g of protein, and 20 mg of vitamin c), and brussels (one 156-g serving contains 50 cal. 5 g of protein, and 100 mg of vitamin c). how many servings of each food are required to satisfy the physicians requirements?