In a co-generating steam power plant the turbine receives steam from a high-pressure steam drum and a low-pressure steam drum as shown in Fig. P11.44, the condenser is made as two closed heat exchangers used to heat water running in a separate loop for district heating. The high-temperature heater adds 30 MW and the low-temperature heaters add 31 MW to the district heating water flow. Find the power co-generated by the turbine and the temperature in the return line to the de-aerator.