Question: Time Series Analysis I am doing a time series problrm. when I uploaded the data, I saw my data was stationary. Then I plot the

Time Series Analysis I am doing a time series problrm. when I uploaded the data, I saw my data was stationary. Then I plot the acf and pacf graph. The acf graph shows a spike at lag 1 and the rest of the lags are significantly zero. The pacf graph shows a spike at lag 1 and the rest of the lags are significantly zero. What is the interpretation of this and what type of model should I use

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