A hospital patient receives a quick 500 cc blood transfusion through a needle with a length of 5.0 cm?

a hospital patient receives a quick 500 cc blood transfusion through a needle with a length of 5.0 cm and an inner diameter of 1.0 mm. if the blood bag is supended 0.85 m above the needle, how long does the transfusion take? (Neglect the viscosity of the blood flowing in the plastic tube between the bag and the needle.)