The order reads: “Over the next 4 hours, infuse 500 ml of 5%…

The order reads: “Over the next 4 hours, infuse 500 ml of 5% Dextrose 0.9% Normal Saline.  The drop factor of the manual IV tubing is 10gtt/mL.  The nurse should set the IV infusion to deliver how many gtt/min?  Round the answer to the nearest whole number.