Consider fully developed pipe flow of a nonlinear viscous fluid with a nonlinear viscosity model of =10+5. The pressure gradient zp is known to be A. (Note that the pressure gradient A has a negative value). The radius of the pipe is known to be R. Write the following quantities in terms of R,A and r. a) Shear stress at the wall, i.e., rn at r=R. b) Shear rate r at a radial position r. c) Velocity vi(r) at a radial position r