A cube of ice is taken from the freezer at -8.7^\circ C and placed in a 104 g aluminum calorimeter filled with 319 g of water at room temperature of...

A cube of ice is taken from the freezer at -8.7^circ C and placed in a 104 g aluminum calorimeter filled with 319 g of water at room temperature of 20.0 ^circ {rm C}. The final situation is observed to be all water at 15.0^circ C.