Steam is supplied to a turbine at a rate of 1.00 × 106 kg/h at 500.°C and 10.0 MPa, and it exhausts to a condenser at 2.00 kPa. A single open loop regenerator is used to heat the boiler feedwater with steam extracted from the turbine at 6.00 MPa. The condensate exits the regenerator at 6.00 MPa as a saturated liquid. Neglecting the pump power, determine

a. The mass flow rate of steam extracted from the turbine.

b. The system's isentropic Rankine cycle thermal efficiency.

c. The isentropic Rankine cycle thermal efficiency of the same system without a regenerator.

d. The percent increase in thermal efficiency due to the regenerator.