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7: The reversible steady flow process 5-1-2-3-4-1 of a body is given in the figure. a. Calculate the total heat transfer in kJ by showing each heat transfer in each process explicitly if the mass of the body is 13 kg. b. If the heat transfer is 73 kJ during the process 2-3-4-1-5, determine the mass of the body. T (°C) 910 500 150 0.1 5 0.3 2 0.9 3 I I 1.2 $ (kJ/kg K)