The sales, in billions of dollars, of Keller Overhead Door Inc. for 2009 to 2014 are as follows. Sales ($ Sales ($ Year billions Yea billions) 2009 $7.39 2012 $7.97 2010 7.59 2013 7.82 2011 8.07 2014 8. 24 a. Not available ion Connect. b. Determine the least squares trend equation. (Round the final answers in thousands to 5 decimal places.) Y'= 270.50470 0 + 0.13838 c. Use the trend equation to calculate the points for 2011 and 2014. (Round the final answers in billions of dollars to 3 decimal places.1 For 2011. IF|77770 For 2014. )1- 819310 d. Estimate the net sales for 2019. (Round the final answer in billions of dollars to 3 decimal places.) For 2019, Y # | 8.834 0 e. By how much have sales increased (or decreased) per year, on average, during the period? (Round the final answer in billions of dollars to 5 decimal places.) 0.13838 0