You are assuming care of your laboring patient with preeclampsia. She just completed a 4 gm Magnesium Sulfate bolus and now you need to give the following order: maintenance dose of Magnesium Sulfate 2.5 grams per hour. Hanging is Magnesium Sulfate 40 grams in 500 mL Normal Saline. How many mL/hr would you set the pump for this order? Round to the TENTHS place. Enter numeric value only.