1) For the data in the Excel file Natural Gas Import Prices, available at http://www. oscm-pro.com/scp) do the following: 5 2E Natural Gas Import Prices.xlsx a) Develop spreadsheet models for forecasting prices using simple moving aver-age and simple exponential smoothing. To compare results, first develop a 3-period moving average model and then a simple exponential smoothing model with a smoothing constant of 0.3