Just answer question (e), and you are not allow use any computer software for any calculations, only allow handwriting calculations and you need to write it step by step clearly.

Question 2 The demands of Model-NB notebook computers at ABC Computer Company from January to October are shown in the table below: Month Demand 61 66 January February March April May June July August September October November December 60 75 71 70 77 80 66 70 (a) Help ABC Computer Company forecast the demand of Model-NB notebook computers for November of the same year by Simple Moving Average (SMA) of 3 periods. (b) On 1 December, it turns up that the actual demand in November is 75. Then forecast the demand of Model-NB notebook computers for December of the same year by Simple Moving Average (SMA) of 3 periods. December At the end of 31 December, it turns up that the actual demand in November is 67. Then estimate the Mean Squared Error (MSE) of all the forecasts of the demands of Model- NB notebook computers in the year by Simple Moving Average (SMA) of 3 periods. (C) (d) Help ABC Computer Company forecast the demand of Model-NB notebook computers for February and onward for the rest of the same year by Exponential Smoothing taking smoothing constant (a) = 0.4 and assuming that the forecast for January ( F1) is 61. (e) Determine the tracking signal of exponential smoothing with a = 0.4 and F1 = 61