The nurse is preparing a client's dose of an IM analgesic in a single syringe. The prescription is hydromorphone 4 mg and hydroxyzine 25 mg. The hydromorphone ampule is labeled 10 mg/mL, and the hydroxyzine is labeled 50 mg/mL. How many total mL should the nurse administer? (Enter the numeric value only. If rounding is required, round to the nearest tenth.)