The efficiency of a particular car engine is 26% when the engine does 6.3 kJ of work per cycle. Assume the process is reversible. What are (a) the energy the engine gains per cycle as heat Qgain from fuel combustion and (b) the energy the engine loses per cycle as heat Qlost. If a tune-up increases the efficiency to 36%, what are (c)Qgain and (d)Qlost at the same work value?
Give your answers in kJ.