A football was inflated to a gauge pressure of 1 bar when the ambient temperature was 15C. When the game started next day, the air temperature at the stadium was 5C. Assume that the volume of the football remains constant at 2500 cm. Gauge pressure of air to which the ball must have been originally inflated so that it would equal 1 bar gauge at the stadium is (a) 2.23 bar (c) 1.07 bar (b) 1.94 bar (d) 1 bar