A power plant operates on the regenerative cycle. Steam is supplied to the turbine at 80 kgf/cm2 and 400°C. It is exhausted to the condenser at 0.05 kgf/cm2. The plant has two feedwater heaters where steam extracted from the turbine is directly mixed with the feed-water. Steam is extracted from the turbine at pressures of 10 kgf/cm2 and 1.5 kgf/cm2. Determine the mass of steam extracted at each of these pressures per kg mass flow at the turbine inlet, the heat rejected in the condenser per kg mass flow at the turbine inlet, the cycle efficiency and the gain in the cycle efficiency over a Rankine cycle operated under the same initial and final conditions: Assume expansion of steam to be isentropic.