Lenovo uses the ZX- 81 chip in some of its laptop computers. The prices for the chip during the past 12 months were as follows:
a) Use a 2- month moving average on all the data and plot the averages and the prices. b) Use a 3- month moving average and add the 3- month plot to the graph created in part (a). c) Which is better (using the mean absolute deviation): the 2- month average or the 3- month average? d) Compute the forecasts for each month using exponential smoothing, with an initial forecast for January of $ 1.80. Use a = .1, then a = .3, and finally a = .5. Using MAD, which a is thebest?