The file P12_46.xlsx contains monthly time series data for total U.S. retail sales of building materials, garden equipment, and supplies dealers. a. Is seasonality present in these data? Yes If so, characterize the seasonality pattern. The seasonality pattern is low |in the colder months, high |in the warmer months. b. Use the Deseasonalize option in StatTools to forecast the deseasonalized data for each month of the next year using the moving average method with a span of 3. (Round your answers to one decimal place.) Aug-2015 Sep-2015 Oct-2015 Nov-2015 Dec-2015 Jan-2016 Feb-2016 Mar-2016 Apr-2016 May-2016 Jun-2016 Jul-2016 X