The net work output (in kJ) of the cycle is

Question

A reversible heat engine receives 2 kJ of heat from  reservoir at 1000 K and a certain amount of heat from a reservoir at 800 K. It rejects 1 kJ of heat to a reservoir at 400 K. The net work output (in kJ) of the cycle is                                                                                                                                                                         

      (a) 0.8                                                                 (b) 1.0

      (c) 1.4                                                                 (d) 2.0