2. For fully developed, laminar flow of a power-law fluid in a tube, the velocity profile is given by vz=n+13n+1vz[1(Rr)nn+1] a) Derive the governing equation for the forced convection heat transfer in a circular tube. b) State your assumptions and reduce the governing equation in terms of bulk temperature of fluid. c) Calculate Nusselt number (Nu) for large z, assuming a constant heat flux at the wall. d) Verify your result for n=1, the Newtonian case