In point $4$ of the following P$-$V diagram, the pressure and temperature of $2$ moles of an ideal diatomic gas are $2$atm and $87\backslash$deg C$.$ The volume of gas in state $2$ is $3$ times greater than state $4$ and its pressure is twice that in state $3.$ Curves $1-2$ and $3-4$ represent isothermal processes. Complete description of the clickThermodynamic

$.-$ Calculate P$,$ V and T in each state and Q$,$ W and U$($The latter in joules$)$

$-$ Complete diagram and with cycle dataThermodynamic.