4. Using the following dataset (Show your work): a. Pot the cata. How co you interpret the nature of the variation in the graph b. The data is random c. Create a series of forecasts for October to January with the Naive method. d. Create a series of forecasts for October to January with the MA3 method. e. Create a series of forecasts for October to January with the WMAB method, with weights 0.5,0.3 and 0.2 . f. For each of the three forecast methods, calculate the error summary statistics Mean Blas, MAD, MSE and MAPE. g. Which forecast method forecasts the best