I need help with this, please!

1.0 kg ice from a freezer at -20 C is added to a reservoir of 2.0 kg of water at 80 C. Assuming there is no heat lost while the mixture reaches thermal equilibrium. Specific heat of water is 4186 J/(kg K). Specific heat of ice is 2090 J/(kg K). Latent heat between ice and water is 3.35 x 10' J/kg. a) How much heat is required to increase the temperature of ice to 0 "C? b) How much heat is required to melt the ice to water at 0 "C? c) What is the final temperature of the mixture