2. A baby named Sally weighs 7 pounds, 11 ounces while her cousin, Greta weighs 3.4 kilograms. Which baby is heavier? (Given: 16 oz = 1 lb, 2.2 lbs = 1 kg) 3. A 12 ounce can of soda costs 55 cents while a 500 ml bottle sells for 69 cents. Calculate the cost per ounce for each. (1 oz. = 30 ml) 4. The drug cocaine may be lethal at a dosage of 1.8 cg per kilogram of body weight. Calculate the (minimum) lethal dose in grams for a 135 lb person. {1kg = 2.2 lb, 100 cg = 1g}