0.5 kg of air is compressed reversibly and adiabatically from \(80 \mathrm{kPa}, 60^{\circ} \mathrm{C}\) to \(0.4 \mathrm{MPa}\), and is then expanded at constant pressure to the original volume. Calculate the heat transfer and work transfer for the whole path. Take \(R=0.287 \mathrm{~kJ} / \mathrm{kg} . K, c_{p}=1.005 \mathrm{~kJ} / \mathrm{kg} . K\) and \(c_{v}=\) \(0.718 \mathrm{~kJ} / \mathrm{kg}\). \(K\).