Relating vapor pressure to vaporization

This graph shows how the vapor pressure of three liquids varies with temperature:

Use the graph to answer the following questions:

$\backslash$table$[[\backslash$table$[[$Which liquid is the most volatile?$],[$Which is the least volatile?$]],\backslash$table$[[$most volatile:$],[$least volatile:$]],\backslash$table$[[$choose one$],[$choose one$]],3],[\backslash$table$[[$What is the normal boiling point of each liquid?$],[$Note: your answer must be within $1C$ of the exact$],[$answer to be graded correct.$]],\backslash$table$[[$octane:$],[$isobutyl alcohol:$],[$acetylacetone:$]],\backslash$table$[[C$