Temperature $-$ composition diagram for a two$-$component A$+$B system with one eutectic and one peritectic point.

$($b$)$ Temperature $-$ composition diagram for a two$-$component A$+$B system with one vapour phase and two partially miscible liquid phases.

Two$-$component, where solids in equilibrium with water vapour form the compounds A$.$H$2$O$,$ A$\mathrm{.}2$H$2$O and A$\mathrm{.}6$H$2$O

Pressure $-$ composition diagram for the salt $($A$)-$ Hydrate $(.$H$2$O$)$ system. PLEASE DRAW THEM ON PAPER PLEASE