QUESTION 1 Selangor had started facing the third wave of COVID-19 when the number of cases recorded by Malaysia Health Ministry increased day by day. Below are the data from 18th October until 27th October 2020. No of cases 3 4 6 Date 18/10/20 19/10/20 20/10/20 21/10/20 22/10/20 23/10/20 24/10/20 25/10/20 9 38 37 96 22 26/10/20 27/10/20 25 155 a) Develop a 2-day moving average to forecast no of cases from 18/10/20 to 28/10/20 and using graph paper, plot the average and the cases. b) Next, forecast for a 3-day moving average and add the 3-day plot to the graph created in part (a). c) Which is better (using the mean absolute deviation): the 2-day average or the 3-day average? d) Compute the forecasts for each day using exponential smoothing, with an initial forecast for 18/10/20. Use a=.1, then a = -3, and finally a = .5. Using MAD, which a is the best