Which properties need to be known to be able to determine the states corresponding to each property couples? After finding these needed properties from corresponding tables, explain why the states given are in which phase region.

Table $1.$ The states of water for property couples

$\backslash$table$[[$The Case,$1^{st}$ Property,$2^{nd}$ Property,State,Reason$],[($a$),P=2$MPa,$T=240C,,],[($b$),P=2$MPa,$T=200C,,],[($c$),P=2$MPa,$V=0\mathrm{.}03\frac{m^3}{k}g,,],[($d$),T=120C,P=100$kPa,,$],[($e$),T=120C,P=200$kPa,,$],[($f$),T=120C,P=198\mathrm{.}54$kPa,,$],[($g$),T=120C,v=0\mathrm{.}001\frac{m^3}{k}g,,],[($h$),T=120C,V=1\mathrm{.}5\frac{m^3}{k}g,,],[($i$),T=-20C,v=0\mathrm{.}001\frac{m^3}{k}g,,],[($j$),T=-20C,P=0\mathrm{.}25$kPa,,$]]$