A mother calls you to ask about a proper dosage of cough medicine for her 2 year old. The bottle says to administer 5.0 mg/kg three times a day for children under 3 years of age. The cough syrup is supplied in a liquid that contains 50.0 mg/mL. How many teaspoons of cough syrup should she give the child who weighs 28 lb in each dose?