The Pulmonary artery, which connects the lungs to the heart, is 8.5cm long and has a pressure

The Pulmonary artery, which connects the lungs to the heart, is 8.5cm long and has a pressure difference over this length of 450 Pa.
(a) If the inside of the artery is 2.4 mm, what is the average speed of the blood in the pulmonary artery?
(b) Find the volumetric flow of blood. (assume the viscosity of the blood is 0.00232Nsec/m2)