Read Encrenaz et al. (2012) and answer the following questions: The authors say

Read Encrenaz et al. (2012) and answer the following questions:
The authors say they have a Seasonal ARIMA model of [(0,1,1) x (0, 1, 1)12 for their monthly data. Explain in terms of the variables in the article what this means.
The authors say they have an ARIMA model of (1,1,1) for their daily data. Explain in terms of the variables in the article what this means.
The authors conclude that sports teams winning important games over a series has the effect of decreasing suicides in men between the ages of 30 and 4. Evaluate their evidence and explain why you would accept or reject their argument.