4.123 A rigid, insulated tank having a volume of 40ft3 initially contains a two-phase liquid-vapor mixture of ammonia at 101F and a quality of 2.3%. Saturated vapor is slowly withdrawn from the tank until a two-phase liquid-vapor mixture at 87F remains. a) [5] Determine the mass of ammonia in the tank initially and finally, each in lb. b) [5] Determine the initial specific volume in the tank in ft3/lb. c) [5] Determine the final specific volume in the tank in ft3/lb. d) [5] Determine the final quality of the ammonia in the tank