An intravenous solution contained 20,000 units of heparin in 1000 ml D5W. The rate of the infusion was set at 1600 units per hour for a 160 pound patient. Calculate the concentration of heparin in the infusion in units/ml. In the previous example, calculate the length of time (hrs) the infusion would run. In the previous example, calculate the dose the patient would receive on a unit/kg/min basis.