\(3 \mathrm{~kg}\) of air at \(45^{\circ} \mathrm{C}\) expands reversibly and adiabatically to 4 times its original volume. The initial pressure of the air mass was \(9 \mathrm{~atm}\). Determine the final pressure, temperature,

and work done when the expansion is (i) adiabatic and (ii) isothermal, given that the heat capacity ratio, \(\gamma=1.4\).