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QUESTION 2 [20] The following data was considered in Assignment 01, Question 1, and a graphical approach was used to assess first order autocorrelation in residuals. year month time (t) sales (yr) 1 1 1 200 1 2 2 21 1 1 3 3 203 1 4 4 247 1 5 5 239 1 6 6 269 1 7 7 31 1 1 8 8 262 1 9 9 260 1 10 10 256 1 1 1 1 1 261 1 12 1 2 288 2 1 1 3 296 2 2 1 4 276 2 3 1 5 305 2 4 1 6 308 2 5 1 7 356 2 6 1 8 393 2 7 1 9 363 2 8 20 386 2 9 21 443 2 10 22 308 2 1 1 23 365 2 12 24 391 STA2604IO1 2/3/2021 (2.1) Use a formal test statistic to assess whether the residuals are positively or negatively auto- correlated. (1 5) (2.2) Do you reach the same conclusion as the one reached in Assignment 01, Question 1, part (1 .4)(e)? Explain your answer. (4)