A.B.C.D.
A.\(1200J;60m\)B.\(1200J;40m\)C.\(1000J;40m\)D.\(1000J;60m\)
A.\(a)\,400K;\,\,\,b)\,130,75K\)B.\(a)\,673K;\,\,\,b)\,130,75K\)C.\(a)\,400K;\,\,\,b)\,403,75K\)D.\(a)\,673K;\,\,\,b)\,403,75K\)
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