The healthcare provider prescribes metoclopramide 7.5 mg/mL IM every 3 hours PRN vomiting for a client who is receiving chemotherapy. The nurse prepares an injection using a 2 ml. prefilled syringe cartridge labeled, "metoclopramide 5 mg/mL." How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)