4. Problem 4 (20\%). Follow the instructions below, create the needed outputs, attach the outputs where required, and explain what is required. Do not attach the full R-screen. If I cannot read your output, the question will receive zero credits. Attach the required plots and tables only. When attaching tables use courier new font, size 8. Do not leave the question blank. Please start each problem on a new page. If the answer is not related to what the question asks, the question will receive zero credits. Do not share your answers or mistakes. If the instructor finds out that students have shared their answers or mistakes, the students will receive zero credits and the academic honesty policies and procedures will apply (as suggested by the Student Handbook which may be found at Handbook). from 2017-2018. only. 4.3. Generate forecasts for the trading days of January 2018. 4.4. Generate a plot of the forecasts and the actual data for the year 2017. Attach the plot here. 4.5. Generate a plot of the residual diagnostics. Explain the residual diagnostics. Attach the plot here. 4.6. Do the Box-Pierce and Ljung-Box correlation tests of the residuals. Explain the results. Attach the results here. (Use courier new font, size 8) 4.7. Fit a drift/random-walk model to the apple series and do a Ljun-box test for the residuals. Explain the results of the autocorrelation test. Identify the estimate of the drift. Explain why dof =1. Attach the results here. (Use courier new font, size 8)