The following data are obtained for a particular reach of the Provo river in Utah: cross sectional area A = 183 ft2, free surface width = 55 ft, average depth = 3.3 ft, Rh = 3.32 ft, V = 6.56 ft/s, length of the reach = 116 ft, and elevation drop of the reach = 1.04 ft. a) Calculate the average shear stress acting on the wetted perimeter, b) calculate Manning coefficient n for this reach, c) determine if the flow is laminar or turbulent and sub- or supercritical.