3.0 moles of an ideal gas are subjected to the following processes. First the volume is tripled in an isobaric process. Then it undergoes an isothermal process to a pressure of 9.0 kPa. The volume is then halved in another isobaric process. Finally, it returns to the original state in an isochoric pro- cess.
(a) Draw a PV diagram of the cycle. Label each state (vertex) with a letter (A, B, ...) and each transition with a number and arrow showing the direction of the process.