a. Plot the data. How do you interpret the nature of the variation in the graph b. Create a series of forecasts for October to January with the Nave method. c. Create a series of forecasts for October to January with the MA3 method. d. Create a series of forecasts for October to January with the WMA3 method, with weights 0.5,0.3 and 0.2 . e. For each of the three forecast methods, calculate the error summary statistics Mean Bias, MAD, MSE and MAPE. f. Which forecast method forecasts the best? Explain your