The following table shows a certain country's petrochemical exports to another country (in billions of dollars) for several years. Let x = 10 correspond to the year 2010. Two equations that model these data are y = 1.28x+2.05 and y=2x-3. Complete parts (a) through (c) below. Year Petrochemical exports 2010 2011 2012 2013 2014 16 18 19 20 22.5 (a) Find the residuals and their sum for each model. Find the residuals for the first model, y = 1.28x+2.05. Year Residual 2010 (Type integers or decimals.) 2011 2012 2013 2014