A vessel of volume V (6 liters) contains water along with its saturated vapor under a pressure of 40 atmospheric and a temparature of 250 c. the specific volume of the water vapor under these conditions is vg= 50 liters/kg the total mass of the contents in the vessels is m= 5.0 kg. Assuming a reasonable value vg for the specific volume of liquid water, determine a) the mass of the vapor b) the volume of the vapor.