Referring to Figure 11.28, describe all the phase changes that would occur in each of the following

Question:

Referring to Figure 11.28, describe all the phase changes that would occur in each of the following cases:
(a) Water vapor originally at 0.005 atm and - 0.5 oC is slowly compressed at constant temperature until the final pressure is 20 atm.
(b) Water originally at 100.0 oC and 0.50 atm is cooled at constant pressure until the temperature is - 10 oC?