The figure below shows the parabolic velocity profile of water flowing within a 2 m diameter cylindrical pipe at 25 C. r and R are the radial distance from the axis of the pipe and the radius of the pipe, respectively. The velocity at the axis of the pipe is 1 ms 1. v=vo (2-0) =1- (a) Calculate the fluid velocity at a radial position that is half-way between the axis and the wall of the pipe. (b) Calculate the magnitude of the shear rate at a radial position that is half-way between the axis and the wall of the pipe. (c) Calculate the magnitude of the shear stress at a radial position that is half-way between the axis and the wall of the pipe