Air is contained in a vertical cylinder fitted with a frictionless piston and a set of stops, as shown in the sketch. The cross-sectional area of the piston is 0.05m². The air is initially at 400 °C and 0.2 MPa. The air is then cooled by heat flow to the surroundings.

A. Determine the temperature (°C) of the air inside when the piston reaches the stops.

B. Determine the final pressure (MPa) if the cooling is continued until the temperature reaches 20 °C.