The power generation company "Luz del Norte" has a Francis turbine operating with a net head Hn of 54 m and a flow rate Q of 9 m^3/s, rotating at a speed N of 300 RPM. The diameters corresponding to the inlet and outlet sections of the runner are, respectively, D1 = 1.5 m and D2 = 0.8 m. The blade height at the impeller inlet is b1 = 0.3 m. The angle of the blades at the impeller inlet is β1 = 100°. The water leaves the impeller with an absolute velocity v2 = 8 m/s, without rotation. Determine: (a) Useful head and hydraulic efficiency. (b) Exit angles of the distributor and impeller blades. As part of the power adjustments in the operation tests, it is requested to make a change in the outlet angle of the distributor by 1° (reduction of the value), while keeping the absolute fluid velocity constant. It is requested to determine: (c) The flow rate and the hydraulic efficiency under the new conditions (note that in this case v2u need not be zero). Please solve this turbomachine problem.