CMS Separate Colums for Section Content on Home Page
 

I have 3 content themes:

Theme a
Theme b
Theme c

I want the content in theme a to span the top of my front page "primary content" area and display excerpts of the two latest articles.

Under this section content, I want two columns, each display 3 of the latest excerpts for theme b and theme c respectively.

Widgets ---------- Primary Content Theme A -----------Widgets
Widgets ---- Theme B Content - Theme C Content ----Widgets


How do I do this?