7. You are given graphs of four AR(1) times series X, = 0; X_ + Z, with different values of the parameter of, i = 1, 2, 3, 4.. Determine the most likely values of of for each graph x1 - x4. .$1 = 0.90, = 0.50, 0 = 0.99, = 0.99. .$1 = 0.99, 07 = -0.50, 6 = 0.90. = -0.99. C. $1 = -0.90, 62 - 0.50, 6 --0.99. 6. = 0.99 1 = -0.99, D. Q1 07 = 0.50, - -0.90, of = 0.99. E. 01 = -0.90, of = 0.99 - -0.99, 0 - 0.50. -2 20 40 60 80 100 20 40 60 80 100 Time Time 10 5 -10 -5 0 4 6 8 10 20 40 60 80 100 20 40 60 80 100 Time