A nurse is preparing to administer diphenhydramine 50 mg PO…

A nurse is preparing to administer diphenhydramine 50 mg PO at bedtime for allergies. Available is diphenhydramine liquid 12.5 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)