At steady state, work at a rate of 5 kW is done by a paddle wheel on a slurry contained within a closed, rigid tank. Heat transfer from the tank occurs at a temperature of 87 degrees C to surroundings that, away from the immediate vicinity of the tank, are at 17 degrees C. Determine the rate of entropy production, in kW/K, for:
(a) the tank and its contents as the system and
(b) an enlarged system including the tank and enough of the nearby surroundings for the heat transfer to occur at 17 degrees C.