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Please kindly answer this question

2. The water in a large lake is to be used to generate electricity by the installation of a hydraulic turbine-generator at a location where the depth of the water is 50m. Water is to be supplied at a rate of 5,000kg/s. If the electric power generated is measured to be 1,862kW and the generator efficiency is 95%, determine (a) the overall efficiency of the turbine-generator device, (b) the mechanical efficiency of the turbine, and (c) the shaft power supplied by the turbine to the generator