QUESTION----------------?

Ten grammes of water at 20degree celcius is converted into ice at -10 deg. Celcius at constant atmospheric pressure. uming the specific heat of liquid water to remain constant at 4.2 J/gK & that of ice to be half of this value, & taking the latent heat of fusion of ice at 0 deg.C to be 335 J/g ,calculate the total entropy change of the system