$12-19$ Table $12-1$ gives the Seireg and Dandage curve fit approximation for the absolute viscosity in customary U$.$S$.$ engineering units. Show that in SI units of mPa$*s$ and a temperature of $C$ degrees Celsius, the viscosity can be expressed as

$=6\mathrm{.}89({10}^6){}_0$exp$[(\frac{b}{1\mathrm{.}8C+127})]$

where ${}_0$ and $b$ are from Table $12-1.$ If the viscosity ${}_0^{\text{'}}$ is expressed in $$ reyn, then

$=6\mathrm{.}89{}_0^{\text{'}}$exp$[(\frac{b}{1\mathrm{.}8C+127})]$

What is the viscosity of a grade $50$ oil at $70C?$ Compare your results with Figure $12-3.$