An alternating pump-turbine system draws water from the upper reservoir during the daytime to produce power for a city. At night, it pumps water from the lower to upper reservoir so that the cycle can be repeated the following day. The design flow rate for this system is 10,000 gal/min in both directions, and the frictional head loss is 15 ft. Calculate: a) The power in kW extracted by the turbine during the daytime. (2 point) b) The power in kW delivered by the pump at night (1 point) c) Over a 24 h period, what is the net power produced (positive or negative