A piece of copper metal weighing 145 grams was heated to 100 degree C and then dropped into 250 grams of water at 25 degree C. The copper metal cooled down and the water became warmer until both were at a temperature of 28.8 degree C. Assuming that the heat lost by the copper was absorbed by the water, what is the Specific heat capacity of copper metal? (C_3 for H_2O is 4.18 J/g middot K).