John Is Trying to Initialize the Seasonality Indexes for an Exponential

Short Answer

John is trying to initialize the seasonality indexes for an exponential smoothing model with seasonality.What is the forecast for quarter 9? The base value smoothing constant is 0.2 while the seasonality constant is 0.3.Use the first year to initialize the model.
$$\begin{array} { l l l l l l l l l } \text { Quarter } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\\hline \text { Demand } & 40 & 250 & 190 & 110 & 69 & 330 & 320 & 280\end{array}$$