3. You set out to forecast the unemployment rate in the United States (UrateUS), using quarterly data from 1960, first quarter, to 1999, fourth quarter. (a) The following table presents the first four autocorrelations for the United States aggregate unemployment rate and its change for the time period 1960 (first quarter) to 1999 (fourth quarter). Explain briefly what these two autocorrela- tions measure. Table 1: First Four Autocorrelations of the US Unemployment Rate and Its Change, 1960:1 - 1999:IV Lag Unemployment Rate Change of Unemployment Rate 0.97 0.62 2 0.92 0.32 3 0.83 0.12 4 0.75 -0.07 (b) The accompanying table gives changes in the US aggregate unemployment rate for the period 1999:1-2000:I and levels of the current and lagged unemployment rates for 1999:1. Fill in the blanks for the missing unemployment rate levels