In question 4-1, taking actual 2009 sales of $48,000 as the forecast for 2010, what sales would you forecast for 2011, 2012, and 2013, using exponential smoothing and a weight α on actual values of (a) 0.4 and (b) 0.8?
a) 2011: $43,200, 2012: $38,880, 2013: $34,992
b) 2011: $28,800, 2012: $9,600, 2013: $3,200
c) 2011: $24,000, 2012: $14,400, 2013: $8,640
d) 2011: $51,200, 2012: $57,600, 2013: $64,800