Question 1 [6] 1.1 A first step in time-series is usually is to identify if the series is stationary or non-stationary (in the mean or variance). Output is given below for two series (Series A and Series B). Identify if the (4) series is stationary or non-stationary. Series B Series A Trend and Correlation Analysis for TY Trend and Correlation Analysis for TY 1.0 1.0 0.5 0.5 9 0.0 9 0.0 -0.5 -1.0 40 60 80 100 5 10 15 20 25 5 15 20 25 0 20 Lag 20 40 60 80 100 10 Lag Observation Observation 10 1.0 10 05- 15- 05 00 PACE 9 0.0 00 -05 -0.5 - -0.5 -10 -10 20 25 .10 S 15 20 25 10 15 20 25 5 10 15 20 25 10 5 10 15 Lag Lag