13. (30pts) A steam power plant operates on an ideal regenerative Rankine cycle with an open feedwater heater. Steam enters the turbine at 10 MPa and 600C and exhausts to the condenser at 5 kPa. Steam is extracted from the turbine at 0.6 MPa. Water leaves the feedwater heat as a saturated liquid. The mass flow rate of steam produced by the boiler is 24 kg/s. What is the power output from this power plant and at what efficiency is it operating?