I'm not sure how these Pressure/Volume (PV) diagrams work. We are given this diagram: When a gas follows path 123 on the PV diagram in the figure below, 404 J of heat flows into the system and 163 J of work is done. and asked the following questions: What net work would be done on or by the system if the system followed path 12341? What net work would be done on or by the system if the system followed path 14321? What is the change in internal energy of the system in the processes described in parts c and d? Not looking for a handout, just want to understand how you calculate net work when it doesnt seem I am given much.