help answer these question using excel, please show calculation and excel work to better understand. American Bottle, Inc. specializes in the manufacture of plastic containers. The data on monthly sales of $10-$ounce shampoo bottles for the last four years as shown below. Assume that you are at the end of February in year $3$ and answer the following; a$.$ In order to construct a triple exponential smoothing model, find the initial intercept, slope and seasonal factors $($for each month$).$ b$.$ Using the forecasting model, find the forecasts for the rest of the year $3$ and year $4.$ Plot both the forecast and observed values on the same chart. c$.$ Assume that you have observed the data for March and then April of year $3,$ update the parameters of your forecasting model two times, one after each observation. Use alpha $=0,15,$ beta $=0,09$ and gamma $=0,1.$