Using the table "Paint Sales Time Series", calculate the forecast for paint sales ( in thousands) for week 11 using exponential smoothing and a smoothing constant of .20. Paint Sales Time Series Week Sales (000's of gallons) 1 6 2 8 3 10 4 9 5 11 6 12 7 10 8 8 9 7 10 9 A) 6.40 B) 7.97 C) 8.64 D) 9.17