A rigid tank with a volume of 2 ft^3 contains air that is initially at 20lbf/in^2, 500 °R. If the air receives a heat transfer of magnitude 6 Btu, determine the final temperature °R, and the final pressure in lbf/in^2. Rair = 53.33 ft·lbf/lb·°R. Assume ideal gas behavior and solve problem using: