Blood from two different patients is to be tested by having it glow through a long straight tube of length 10 cm and internal diameter 6 mm. A pressure drop of 50 dynes/cm2 is imposed from one end of the tube to the other, and the resulting blood flow rate Q is measured. If the blood from patient A has a yield shear stress of 0.08 dynes/cm2 and the blood from patient B has a yield shear stress of 0.12 dynes/cm2, predict the ratio QA/QB. Assume that the blood from both patients follow Casson rheology, with the exception of the difference in yield stresses.