The table named "Sales" to the right, shows the sales of a supermarket (in thousand dollars) in the last 12 months. Note: to facilitate answering the questions in the next two sheets, use Excel Data Analysis Tool Pack (except for questions 1b and 2d); 1 2 3 4 5 6 7 8 9 H 0 H H H N a) Develop the 2-month and 3-month moving averages for the supermarket sales. Note: use data analysis tool pack. b) Which moving average appears to provide more accurate forecasts based on MAE? Explain. Note: show your MAE calculations