Problem $2$: What is the net work done by the following cycle? Steam is expanded

isothermally at $650$C from $2\mathrm{.}5$ MPa to $1\mathrm{.}4$ MPa. It is then adiabatically cooled to

$425$C and $1\mathrm{.}2$ MPa. Then it is compressed isothermally to $1\mathrm{.}8$ MPa. The final step

is the return back to the original conditions in an adiabatic process. In addition

to doing the calculation, illustrate the cycle and net work on a P$-$V diagram.