On the "you" thing....
Yes, no, maybe.
You is both singular and plural depending on context.
In this case it may be plural, though normally it wouldn't be.
For example, the spell might be cast though the use of a collective or cooperative casting feat (though why a group would do this for a level 0 spell is a nother question), or the caster and party may be using a telepathic spell, item, or other ability to share preceptions.
There is also the matter of the familiar, but then the question becomes if the familiar is considered part of the caster's (or possibly casters') self (or selves).