Answer
No. No.
Work Step by Step
From the typical phase diagram shown in Figure 18.24, we see that there is no liquid present below the triple point pressure. Table 18.3 shows that the triple point pressure for carbon dioxide and for water are each higher than 600 Pa, the Martian atmospheric pressure.
We conclude that liquid carbon dioxide and liquid water do not exist on the surface of Mars (though water is borderline).
