A. A reversible heat engine operates between TH and TC , with heats QH and QC . What is the total increase in entropy (the heat engine and its environment) after one cycle? B. An irreversible heat engine operates between TiH and TiC , with heats QH and QC (i.e., the same heats as the above reversible heat engine). How does the total change in entropy for the irreversible heat engine compare to the change in entropy for the reversible heat engine