Steam flowing at a mass flow rate of 2 kg /s enters an adiabatic and reversible highpressure (HP) turbine at 8 MPa and 520 ?C (State 1) and expands to a pressure of 800 kPa (State 2). A fraction of the steam (y) is extracted at State 2 and the remaining steam (1 ? y) expands in an adiabatic and reversible low-pressure (LP) turbine to 100 kPa (State 3). The remaining steam passes through a constant-pressure condenser and exits as saturated liquid at 100 kPa (State 4). An adiabatic and reversible pump increases its pressure to 800 kPa (State 5). Liquid leaving the pump at State 5 is mixed with the steam fraction (y) extracted at State 2 in a rigid, insulated mixing tank. Steam exits the mixing tank as saturated liquid at 800 kPa (State 6). a) Determine the fraction of steam (y) extracted at State 2. b) Calculate the total power (in kW) of the HP- and LP-turbines. c) Calculate the rate of entropy generation for the mixing tank.