$5($c$)\_\backslash$#$2$: Water is the working fluid in a multi$-$stage regenerative Rankine cycle. Superheated vapor enters the first$-$stage turbine at $\backslash (14\backslash$mathrm$\{$MPa$\},520^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ),$ and expands to $4$ MPa where some of the steam is extracted and diverted to a closed feedwater heater. The remainder of the feedwater then expands to $1$ MPa through the second$-$stage turbine where more is extracted to an open feedwater heater. The feedwater leaves the open feedwater heater as saturated liquid and condensate drains from the closed feedwater heater as saturated liquid and is trapped into the open feedwater heater. The feedwater leaves the closed feedwater heater at the saturation temperature for $4$ MPa $.$ The condenser pressure is $8$ kPa $.$ All turbines and pumps operate with an efficiency of $\backslash (88\backslash \%.\backslash$left$(\backslash$mathrm$\{$W$\}\_\{\backslash$text $\{$cycle $\}\}=784\mathrm{.}69\backslash$mathrm$\{$~kJ$\}/\backslash$mathrm$\{$kg$\}$ ; $34\mathrm{.}3\backslash \%\backslash$right$)\backslash )$