2. A) If the nominal diameter of the pulmonary artery is 3 cm and a typical pulmonary capillary is 7 μm in diameter, show that if the diameter ratio DR=0.6114, the number of generations from parent vessel to terminal capillaries is about 17. B) If there are 3.2x109 terminal capillaries, what is the branching ratio BR? 2. A) If the nominal diameter of the pulmonary artery is 3 cm and a typical pulmonary capillary is 7 μm in diameter, show that if the diameter ratio DR=0.6114, the number of generations from parent vessel to terminal capillaries is about 17. B) If there are 3.2x109 terminal capillaries, what is the branching ratio BR?