A Rankine cycle with one open feedwater heater has a water mass flow rate through the steam generator of 300 lbm/s. Superheated steam enters the turbine system at 2800 psia and 1000°F, and saturated liquid water exits the condenser at 4 psia. The open feedwater heater receives extracted steam from the turbine at 350 psia, and saturated liquid water at 350 psia exits the open feedwater heater. Determine the net power produced by the cycle and the thermal efficiency of the cycle if (a) the turbine and pumps are isentropic, and (b) the turbine isentropic efficiency is 0.82 and the isentropic efficiencies of both pumps is 0.65.