An ideal air refrigeration cycle is operated at the upper temperature of \(35^{\circ} \mathrm{C}\) and the lower temperature of \(-20^{\circ} \mathrm{C}\). The COP of the cycle is 3 . Determine the work of the expander, the work of the compressor, and the net work of the cycle. Also estimate the mass flow rate of air. Take \(C_{P}=1.007 \mathrm{~kJ} / \mathrm{kg}\) and \(\gamma=1.4\).