What is the work done during non – adiabatic process?

Question

In an adiabatic process 6000 J of work is performed on a system. In the non – adiabatic process by which the system returns to its original state. 1000 J of heat is added to the system. What is the work done during non – adiabatic process?

         (a) + 7000 J                    (b) – 7000 J

         (c) + 5000 J                    (d) – 5000 J