Phase diagrams: Use the phase diagram for $C{O}_2$ below to answer the following questions.

A science fiction novel is set on the planet Astrona where the atmosphere pressure is $10$ atm. The life forms exist in part by drinking liquid carbon dioxide. Estimate the minimum and maximum temperatures that carbon dioxide can exist as a liquid at these pressures.

Would you expect $C{O}_2$ to get more or less dense on freezing? Justify your answer.

Carey is a geologist and uses carbon dioxide to extract an organic compound from a rock bed. He carried out the experiment at a pressure of $74$atm and $320K.$ What phase of carbon dioxide is Carey using?