Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_79288 ( "TV Station (Operator)" text, "2005" real, "2006" real, "2007" real, "2008" real, "2009" real, "2010" real, "2011 1H" real )

### Question ###
What is the average 2007 value for a 2006 of 2.8 and 2009 under 20?

### Accurate SQL ###

SELECT AVG("2007") FROM table_79288 WHERE "2009" < '20' AND "2006" = '2.8'