23 - 52Y_{t-1} + 37Y_{t-2}$$
We need to find the forecasted value for time period 27, which means we need to find $Y_{27}$. To do this, we need the values of $Y_{26}$ and $Y_{25}$.
From the given data, we know that $Y_{26} = 114$. We don't have the value of
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