A 0.15-kg of aluminum contains 0.2 kg of water. Initially, the water and the cup have a com- mon temperature of 18 0C. An unknown material (m=0.04 kg) is heated to a temperature of 97 0C and then added to the water. The temperature of the water, the cup, and the unknown mate- rial is 22 0C after thermal equilibrium is reestablished. Ignoring the small amount of heat gained by the thermometer, find the specific heat capacity of the unknown material.