Problem 4.9d Lenovo uses the ZX-81 chip in some of its laptop computers. The prices for the chip during the last 12 months were as follows: Month January February March April May June Price Per Chip $1.90 $1.61 $1.60 $1.85 $1.90 $1.95 Month July August September October November December Price Per Chip $1.80 $1.83 $1.60 $1.57 $1.62 $1.75 This exercise contains only part d. With a = 0.1 and the initial forecast for October of $1.83, using exponential smoothing, the forecast for periods 11 and 12 is (round your responses to two decimal places): Month Oct Forecast $1.83 Nov 1.8 Dec 1.79 With a = 0.3 and the initial forecast for October of $1.77, using exponential smoothing, the forecast for periods 11 and 12 is (round your responses to two decimal places): Month Oct Forecast $1.77 Nov 1.71 Dec 1.68 With a = 0.5 and the initial forecast for October of $1.72, using exponential smoothing, the forecast for periods 11 and 12 is (round your responses to two decimal places): Month Forecast Oct $1.72 Nov 1.65 Dec 1.64 Based on the months of October, November, and December, the mean absolute deviation using exponential smoothing where a = 0.1 and the initial forecast for October = $1.83 is $ (round your response to three decima