$4.$ There are several variables that are important in determining exchange rates. Develop a multifactor model based on your chosen variables and estimate the model based on historical data. Use your model to generate the AUD$/$USD forecast for the next quarter. Explain your data $($include time period$/$frequency employed$),$ methods, and results for your exchange rate forecasts. Hint: This is an open$-$ended question, and your group is encouraged to use your initiative and seek other sources for ideas on what else to include.