1. (4 points) Present your STATA output results for all four models. 2. (4 points) In Model 2 and Model 4, should the seasonal factors be (jointly) included? 3. (4 points) Look at Model 2. Use quarter 4 as the reference group. Refer to your estimated STATA output. How do you interpret the coefficient for the dummy variable for quarter 2? (Interpret the number, not just the sign.) 4. (4 points) If you were to forecast future (beyond June 1993) S&P 500 index, which model above would you use? Why? Your rationale should be based on STATA outputs, graphs, and/or results rather than simple explanations by words. 5. (4 points) Following the last part, use your chosen model to make forecasts of the S&P 500 index for the next six periods (July-December 1993) by using STATA. List the predicted values. How do you like your forecasts? Why