A five-month-old infant is ordered acetaminophen q6h for a high temperature. The usual adult dose is 325 mg q4-6h. The available acetaminophen is 160 mg/5 mL. What volume of medication should the infant receive every six hours? a) 3.2 mL b) 0.28 mL child's dose ) 0.34 mL child's dose d) 1.6 mL