i need help with this. Thanks

3. (a) Draw PT and PV phase diagrams, identify regions of various phases, and show the constant-temperature vaporization process depicted in Figure 2-3 of Text-uploaded in Moodle (p.51) on these diagrams. (b) Apply Gibbs' phase rule in the liquid, liquid-vapor, and vapor regions of the diagram in (a) above and identify the number of degrees of freedom. Fig. 2-3. Typical phase diagram of a pure substance with two lines of isothermal expansion: 123 below critical temperature, 45 above critical temperature