Answer
See answers.
Work Step by Step
See the diagram, which is pressure (atm) versus volume (liters).
The first segment, A, is the cooling and compression at constant pressure. The path on the diagram is at constant pressure, thus horizontal, from 2.5 L to 1.0 L.
The second segment, B, is the isothermal expansion back to 2.5 L. The temperature is constant, so the ideal gas obeys “PV is constant”. The volume increases by a factor of 2.5, so the pressure decreases by a factor of 2.5. Segment B is a piece of a hyperbola.
The third segment, C, is the pressure increase at constant volume. This is a vertical path from 0.4 atm up to 1.0 atm.