Draw a pressure-temperature phase diagram for water. Label the phases, the normal boiling point, the triple point, and the critical point. (a) Draw a line A on the diagram that shows ice being melted and heated to its boiling point at constant pressure. (b) Draw a line B on the diagram that shows water vapor being condensed by cooling at constant pressure. (c) Draw a line C on the diagram that shows water being vaporized by decreasing pressure at constan temperature