How does the diagram violate the second law of thermodynamics?
edit: i found the answer after finishing the question.
"the diagram violates the second law of thermodynamics because it shows thermal energy flowing from a cold object to a hot object. the second law of thermodynamics states that thermal energy flows from a hot object to a cold object."

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)