An insulated rigid tank is divided into two parts by a partition. One part of the tank contains$=4\mathrm{.}4$ kg of water at $=300$ kPa and $=110$ deg C while the other part is evacuated. The partition is now removed, and the water expands to fill the entire tank. If the final pressure is $=15$ kPa $,$ the volume of the entire tank is closest to:

$($Hint: The tank is NOT necessarily divided into two equal parts.$)$ Answer is $4\mathrm{.}673$ m$^3,$ please explain and show work.