Finding Specific Heat capacity of an unknown sample?

An aluminum calorimeter of mass 100g contains 250g of water. They are in thermal equilibrium at 10 degrees Celsius. Two blocks are placed in the water. One is a 50.0g piece of copper 80.0 degrees Celsius. The other sample has a mass of 70.0g and is originally at a temperature of 100 degrees Celsius. The entire system stabilizes at a final temperature of 20 degrees Celsius. Determine the specific heat of the unknown sample and determine the material of the unknown