The official rules of the national football league require footballs to be inflated to a gauge pressure (pressure above atmospheric pressure) between 12.5 and 13.5 psi. in 2015 the new england patriots were accused of deliberately under-inflating footballs to gain an advantage during the playoffs. if the football used during the game was filled to 13.5 psi at 70o f, what temperature would be required to deflate the football to 10.5 psi?