Heat And Thermodynamics

An ideal gas goes from state \(A\) to state \(B\) via three different processes as indicated in the \(p\)-\(V\) diagram. If \(Q_1, Q_2\) and \(Q_3\) indicate the heat absorbed by the three processes and \(\Delta U_1, \Delta U_2\) and \(\Delta U_3\) indicate the change in internal energy along the three processes respectively, then