A steam heating system for a building 175 m high is supplied from a boiler 20 m

Question:

A steam heating system for a building 175 m high is supplied from a boiler 20 m below ground level. Dry, saturated steam is supplied from the boiler at 300 kPa, which reaches the top of the building at 250 kPa. Heal losses from the supply line to the surroundings is 50 kJ/kg. Determine
The quality of steam at the 175 m elevation. Neglect any change in ke.