Run two ARIMA models in R code for a time series with 700 data values, data having a range between -2.000 and 2.000 . De

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Run two ARIMA models in R code for a time series with 700 data
values, data having a range between -2.000 and 2.000 . Describe the
methodology used. Must include evidence of hypotheses raised, the
decision rule of each one, as well as the impression of the screens
of R and/or tables generated as a basis for your comments. It is
essential to include, within the description, the
values​​(coefficients, p-values, bands, among others) that appear
on the screens and make annotations relevant to each. It is NOT
necessary to document the step by step carried out during the
solution, only describe the final cases.