Figure shows two processes \( a \) and \( b \) for a given sample o...

Figure shows two processes \( a \) and \( b \) for a given sample of gas. If \( \Delta Q_{1}, \Delta Q_{2} \) are the amount of heat absorbed by the system in the two cases; and
\( P \) \( \Delta U_{1}, \Delta U_{2} \) are changes in internal energy respectively. then
(1) \( \Delta Q_{1}=\Delta Q_{2}: \Delta U_{1}=\Delta U_{2} \)
(2) \( \Delta Q_{1}\Delta Q_{2} ; \Delta U_{1}\Delta U_{2} \)
(3) \( \Delta Q_{1}\Delta Q_{2} ; \Delta U_{1}\Delta U_{2} \)
(4) \( \Delta Q_{1}\Delta Q_{2} ; \Delta U_{1}=\Delta U_{2} \)