Problem Statement: Blood is a pseudoplastic fluid that has a variable viscosity at 37 °C that depends on the percent composition of hematocrit and plasma. It will usually range between 3 x 10^-3 to 4 x 10^-3 Pa s. A small sample of blood is tested in a viscometer and the following results are obtained: (Shear stress (Pa), Shear rate (s^-1)) (0.0235, 2.25) (0.0396, 4.5) (0.0787, 11.25) (0.1324, 22.5) (0.2227, 45) (0.3746, 90) (0.7447, 225) (1.2524, 450) Determine the viscosity of the blood sample using the power law for non-Newtonian fluids: τ=ηγ^n where τ is shear stress, η is viscosity, γ is shear rate, and n is the flow behavior index. _____ I have no idea where to start, since I have two unknowns in this problem. It also seems like the sample would have a different viscosity at each point, but the problem only asks for one value. I am truly lost. Any help or insight would be greatly appreciated!