Poiseuille was a physician interested in the flow of blood through blood vessels in the body. Estimate the viscosity of blood from the fact that blood passes through the aorta of a healthy adult at a rate of about $84c{m}^3{s}^{-1},$ with a pressure drop of $0\mathrm{.}98mmHg{m}^{-1}.$ Assume $9mm$ as the radius of the aorta for a typical human. Provide you answer in units of $kg{m}^{-1}{s}^{-1}.$