How Do I script this?

[Elcron Valdune]

How do I get it to say that I can get a feat when my Ability to cast 2nd-level spells?

the feat reads like this,
Prerequisite: Ability to cast 2nd-level spells.
Benefit: As long as you have an acid spell of 2nd level or
higher available to cast, you can throw an orb of acid as a
ranged touch attack. The attack has a range of 5 feet per level
of the highest-level acid spell you have available to cast and
deals 1d6 points of damage per level of that acid spell.
As a secondary benefit, you gain a +1 competence bonus
to your caster level when casting acid spells.

How do I script it to only pop up when a caster has 2nd lvl spells?