Air, $4$ moles of air in a piston$-$cylinder

undergoes a cyclic process as schematically

shown by the path $1231$ in the $P-V$

diagram. Calculate the unknown quantities in

the table shown below: $($You may assume

ideal gas behavior with $C{V}^{**}=\frac{3}{2^{**}}R$

$U_{11}=U_{12}+U_{23}+U_{31}=0$ for cyclic

process$)$