A system is transformed for state A to state B, rising its internal energy by 4x10^4 Joules while 6.0x10^4 Joules of heat is added. The System is then returned to the State A While 3x10^4 Joules of heat is taken away.
i) Determine the work done by the system as its state is transformed from A to B.
ii) Determine the work done in transforming from B to A
iii) Determine the total work done.