6. Opportunity Costs Identify several possible uses of your time that will be available to you after school today. What will you actually do, and what will be the opportunity cost of your decision? Explain how your decision will or will not affect your friends and members of your family​

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?