Managerial Forecasting and Decision Analysis-Mini project

6 (or another one of your choosing). u can use whole food market stock price data
Get the daily close for the last 360 days.
Use data up to 12/31/2020 to fit a model using your best smoothing method.
Build a forecast for the first 100 days of this year using that model and calculate performance measures. You may feed the model the historical data needed (i.e. from dates after 1/1) to make the model create the forecast but should only develop the model using data through 12/31.
Now use data from 1/1/2021 – 7/31/2021 and fit a model.
How are the models different and why?
Build a forecast for 8/1/2021 – 9/25/2021 using the new model and same process used in part 3 above and calculate your performance measures.
Explain how the two models differ, now their performance differed, and why.
2.6 Find the closing stock price for a stock that interest you for the last 200 trading days. Find the sample autocorrelation function for this time series. Is the time series stationary? Use the moving average technique to gain insights on the data.