At which point on a phase diagram do you have a solid, liquid, and a gas at the same time? boiling point, triple point, melting point, critical point

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

May someone me with these science questions