A geothermal power plant uses geothermal water extracted at 160C at a rate of 440 kg/s as

Question:

A geothermal power plant uses geothermal water extracted at 160°C at a rate of 440 kg/s as the heat source and produces 22 MW of net power. If the environment temperature is 25°C, determine
(a) The actual thermal efficiency,
(b) The maximum possible thermal efficiency, and
(c) The actual rate of heat rejection from this power plant.