The following is 12 years’ demand for Viking Village, a game now available for handhelds and smartphones:

Year Demand 2001 20,123 2002 18,999 2003 20,900 2004 31,200 2005 38,000 2006 41,200 2007 49,700 2008 46,400 2009 50,200 2010 52,300 2011 49,200 2012 57,600

a. Graph the demand data for Viking Village.

b. Determine the linear trend for Viking Village, using a three-year moving average.