A sample of an ideal gas is taken throug...

A sample of an ideal gas is taken through the cyclic-process `ABCA` shown in Fig. It rejects `50 J` of heat during the part `AB`, doens not absorb or reject the heat during `BC`, and accepts `70 J` of heat during `CA`. Forty joules of works is done on the gas during the part `BC`. The internla energies at `B` and `C`, respectively, will be

1450 J and 1410 J

1550 J and 1590 J

1450 J and 1490 J

1550 J and 1510 J

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