Consider the following data that shows the quantity of coffee produced in Brazil from 2004-2012.

          Year                             Production (in tons)

2004 ………………………………   2,465,710

2005 ………………………………   2,140,169

2006 ………………………………   2,573,368

2007 ………………………………   2,249,011

2008 ………………………………   2,796,927

2009 ………………………………   2,440,056

2010 ………………………………   2,907,265

2011 ………………………………   2,700,440

2012 ………………………………   3,037,534

a. Plot the data in a time series graph.

b. What is the mean quantity of coffee that Brazil produced from 2009 to 2011?

c. In percentage terms, how much has the 2012 crop increased over the 2009-2011 mean? ​