A school-aged client is receiving vancomycin, 400 mg IV every 6 hours for a Methicillin-Resistant Staphylococcus Aureus (MRSA) infection. The medication is diluted in a 100 mL bag of 0.9% sodium chloride with instructions to infuse over one and a half hours. How many mL/hour should the nurse program the infusion pump? (Please enter the numeric value only. If rounding is required, round to the nearest whole number.