Financial Econometrics Data analysis part

You are a research associate at the World Bank and have been asked to study the U.S. GDP and how it has changed in time and provide a forecast for future values. You are asked to compare the performance of the U.S. economy, as represented by the GDP and its changes, to that of at least two additional large economies
You only have to finish the data analysis description part with figure resultshere are exampleshttps://www.scirp.org/journal/paperinformation.aspx?paperid=89487#:~:text=Based%20on%20the%20parameter%20values,to%20government%20and%20business%20institutions.