A 0.40-kg iron horseshoe is dropped into 1.15L of water in a 0.34-kg iron pot initially at 20.0?C. The value of specific heat for iron is 450 J/kg?C? , and for water is 4186 J/kg?C? . If the final equilibrium temperature is 25.0 ?C, Determine the initial temperature of the hot horseshoe.