Consider a power law fluid flowing in a cylindrical nozzle. The fluid is characterized by $K=8\mathrm{.}24kg/m^{**}{s}^{2-n}$ and $n=0\mathrm{.}64($unitless$).$ If the shear stress at the pipe wall is $464Pa,$ what must the velocity gradient of the fluid at the pipe wall? The answer will have units of $\frac{\frac{m}{s}}{m},$ but omit the units from the answer.