In a steam power plant operating on the ideal regenerative Rankine cycle with one open feed water heater, steam enters the turbine at 15 MPa, 620oC and is condensed in the condenser at a pressure of 15 kPa. Bleeding from the turbine to the FWH occurs at 1 MPa. Determine
(a) The fraction of steam extracted and
(b) The thermal efficiency (ηth) of the cycle.