A well-insulated storage tank of 60 m^3 contains 200 L of liquid water at 75 degree celsius. The rest of the tank contains steam in equilibrium with water. Spent process steam at 2 bar and 90 percent quality enters the storage tank until the pressure in the tank reaches 2 bar. Assuming that the heat losses from the system to the tank and the environment are negligible, calculate the total amount of steam that enters the tank during the filling process and the fraction of liquid water present at the end of the process.