he annual demands of Product A in the previous nine years is shown in Table$-1$ below.

Forecast the annual demands of the next three years $($i$.$e$.2024,2025$ and $2026)$ using

Seasonality$-$Adjusted Exponential Smoothing Forecasts with the smoothing factor, alpha,

being $0\mathrm{.}1.$ Then evaluate the MAD $($Mean Absolute Deviation$)$ of the forecast.