A sample of an ideal gas is initially in state i with pressure P_0 and volume V_0. The gas expands to a final volume of 2V_0 via three different quasi-static processes:

Process 1 is an isobaric expansion to volume 2V_0.
Process 2 is a straight-line path on a PV diagram from state i to state f, where state f has pressure 0.5P_0 and volume 2V_0.
Process 3 is an isothermal expansion at temperature T_0 from state i to state f.

Which of the following correctly ranks the net energy transferred to the gas by heating, Q, for the three processes?