Can you please help me with a question? 10 pts.?

Consider three engines that each use 1650 J of heat from a hot resevoir (temperature = 550 K). These three engines reject heat to a cold resevoir (temperature 330 K). Engine I rejects 1210 J of heat. Engine II rejects 990 J of heat. Engine III rejects 570 J of heat. One of the engines operates reversibly, and two operate irreversibly. However, of the two irreversible engines, one violates the second law of thermodynamics and could not exist. What is the total entropy change of the universe for (a) engine I, (b) engine II, and (c) engine III? (Note: The total entropy change of the universe is the sum of the entropy changes of the hot and cold resevoirs.)