Q$3)$Adaptive Smoothing of an Exponential Forecasting method.

Use the same Forecast Error Measurement you used in Q$2)-$c$))$ to find the Best smoothing parameter $\backslash (\backslash$alpha $\backslash )$ of the Exponential Smoothing Forecast Method, assuming an initial forecast for May $2021$ is $500.$

Note: The Best smoothing parameter $\backslash (\backslash$alpha $\backslash )$ is the value that will lead to the Smallest forecast error measurement.

Q$4)$ Tracking Signal

Use the Linear Trend forecasts method $($Q$2)-$c$)),$ calculate the Tracking Signal for forecasts from January $2021$ to December $2024,$ plot the Tracking Signal Chart $($assuming control limits $\backslash ($ C$=3\backslash ),$ and $\backslash (-$C$=-3\backslash )),$ then make a conclusion on whether or not the forecasts are Biased when applied the Linear Trend method to the collected historical data.