Problem: The physician orders magnesium sulfate for preterm labor. The order states: administer a 4- gram bolus over 30 minutes followed by 2 grams per hour. The pharmacy sends you 20 grams of magnesium sulfate in 500 ml of Lactated Ringers. Program the pump for a 4-gram loading dose. Then program the pump for a continuous infusion of magnesium sulfate. What rate would you expect the Lactated Ringers to be set at if the order states total fluids should be at 125 ml/hour?