human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: TV Station (Operator), 2005, 2006, 2007, 2008, 2009, 2010, 2011 1H
###Question: What is the average 2007 value for a 2006 of 2.8 and 2009 under 20?
gpt
SELECT AVG 2007 FROM table WHERE 2009 < 20 AND 2006 = 2.8