Problem 3: Fill in the table. Then, compute sample variance, autocovariance, and autocorrelation using quantities obtained from the table, and clearly showing your calculations. In the calculation of sample autocovariance and autocorrelation, you can use the sample mean and variance for the entire sample, which is also the way the table is organized. Yt-2 jy(t) yt Yt-1 Yt-3 fy(t) (yt - wy(t))2 y-1-jy(t) (y - wy(D))(yt-1-fly(t)) Yt 112 118 132 129 121 135 Time, t Jan 1949 Feb 1949 Mar 1949 Apr 1949 May 1949 Jun 1949 Jul 1949 Aug 1949 Sep 1949 Oct 1949 Nov 1949 Dec 1949 Sum 148 148 136 119 104 118 Sample variance: Sample autocovariance: Sample autocorrelation