grammar help: Fred's and George's, of Fred and Geroge's...

<p>Which is correct when talking about two people w/ possessives when the two things are not shared…(like they each have their own house):</p>

<p>I went to Fred and Geroge’s houses.
I went to Fred’s and Geroge’s houses.
I went to Fred’s and George’s house.</p>

<p>Fred’s and George’s houses</p>

<p>[url=<a href=“http://www.kentlaw.edu/academics/lrw/grinker/LwtaPossessives.htm]Possessives[/url”>Possessives]Possessives[/url</a>]</p>

<p>look @ #4</p>