A coach inflates a football to the required gauge pressure of 13 lb/in^2 prior to a championship game. The football has an internal volume of 160in^3 and the air is at a temperature of 25 F when the football is first inflated. As the game ended, the air temperature inside the football had dropped by 15 F. Assuming that the volume of the football does not change significantly during the cooling process, evaluate the following:
a) the mass of air inside the ball.
b)the pressure of the air inside the ball just when play begins.
c) the amount of heat transfer from the air in the ball during the entire game.