Build a Forecast Model Using a Simple Exponential Smoothing Model

Short Answer

Build a forecast model using a simple exponential smoothing model with 2009 demand provided below.The exponential smoothing constant is 0.3.What is the bias for this model when the Forecast for January is set at 24?
$$\begin{array} { c c c c c c c c c c c c c } \text { Month } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 \\\hline \text { Demand } & 17 & 20.4 & 23.8 & 27.2 & 21.6 & 27.6 & 31.2 & 26.35 & 22.95 & 15.3 & 16 & 14\end{array}$$