We have a container of a hot ideal monatomic gas. The volume of the container is 25 liters. The temperature of the gas is 409 degrees C and its pressure is 0.858x10^5 Pa. We allow the gas to cool down to room temperature, which at the time is 21 degrees C. We do not allow the volume of the gas to change. (a) Find the final pressure (Pa) of the gas. (b) Find the amount of heat (J) that passes from the gas to its surroundings as it cooled. (Give a positive value) (c) Find the change of internal energy (J) of the gas. Be sure to include the correct sign on the answer.