a) A mass of 2.4kg of air at 150kPa and 12C is contained in a gas-tight, frictionless piston. cylinder device. The air is now compressed to a final pressure of 600kPa. During the process, heat is transferred from the air such that the temperature inside the cytinder remains constant. Calculate the work input during this process. (5 marks) b) A piston cylinder device contains 1kg of liquid water and 4kg of water vapour in equilitbrium at 600kPa. Heat is transferred at constant pressure until the temperature reaches 300C. Determine: i. The boundary work, in kJ. ii. The amount of heat transferred during the process, in kJ. (8 marks) (7 maks)