An 81-yeаr-оld client is hоspitаlized with persistent nаusea fоllowing abdominal surgery. The client reports nausea rated 7 on a 0-to-10 scale and has been unable to tolerate oral medication. Provider order: Ondansetron 6 mg IV Q4h prn Available: Ondansetron 2 mg/mL How many milliliters should the nurse administer per dose? ____[BLANK-1]____