A mole of gas in a closed system undergoes a fourstep, cyclic process that returns it to the original state 1. The following table gives some data on the steps of the process. Fill in the blanks

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Step 1-2 2+3 3-4 4 1 1 2 3 4 1 AU (J) -200 4700 Q (J) -3800 -800 W(J) -6000 300 -1400