The attached time series plot shows monthly electricity demand in Australia. Sketch what the correlogram should look like and explain why you drew it like that. What does the confidence interval around 0 (in the correlogram) tell you? If the p value for the Ljung-Box test is 0.0678, what would you conclude? State the null hypothesis, the alternative hypothesis and the steps you took to reach your conclusion. 14000 - 12000 GWh 10000 - 8000 - 1980 1985 1990 1995 Year