7. For each cyclic process diagram below, determine if they may be pessible or impossible in the real world. Write the letter that comeaponds to the correct description of your answet. (2 marks) a) A real refrigerator. e) A refrigerator that breaks Carnot's theorem. b) A real engine. f) An engine that breaks Carnot's theorem. c) A Camot refrigerator. e) A cycle that breaks the Clausius form of the Second Law. d) A Camot engine. h) A cycle that breaks the Kelvin form of the Second Law