A hospital pharmacy receives a medication order for 500 mg aminophylline in 250 mL normal saline solution for a 132-lb patient. The aminophylline is to be administered at a dose of 300 mu g/kg/h using an IV set that delivers 60 drops/mL. The pharmacy has 20-mL vials of injection containing aminophylline, 25 mg/mL. Calculate the following: 

(a) The milliliters of aminophylline injection that should be added to the normal saline solution. 

(b) The total volume of the intravenous infusion. 

(c) The milligrams of aminophylline administered per hour. 

(d) The duration, in hours, for the complete infusion. 

(e) The number of milliliters of infusion delivered per hour (flow rate, mL/h). 

(f) The number of drops administered per minute (flow rate, drops/min).