the river flow passes through a 2.08 wide rectangular sharp crested weir. If the water level several meter upstream is 1.4 m what is the discharge (m^3/s) over the weir given that the flow reaches 0.1m above the crest? assume cw=0.637 and do not consider the velocity approach

For #5-7, assume there is a creek with a width of 4.6 m, depth of 23 cm, slope of 0.001 m/m, and discharge of 0.13 m³/s. 5. Assuming a rectangular cross section, what is the hydraulic radius of the creek to the nearest cm? 6. What is the average flow velocity to the nearest cm/s? 7. And what is the channel's Manning's roughness coefficient (using SI units) to the nearest hundredth?