Below Are the First Two Values of a Time Series

Multiple Choice

Below are the first two values of a time series and the first two values of the exponential smoothing forecast. $$\begin{array}{l}\begin{array} { l l l } &&\text { Exp onential Smoothing }\\\text { Time Period } ( t ) & \text { Time Series Value } \left( Y _ { \mathbf { t } } \right) & \text { Forecast } \left( F _ { \mathbf { t } } \right) \\1 & 18 & 18 \\2 & 22 & 18\end{array}\end{array}$$ If the smoothing constant equals .3, then the exponential smoothing forecast for time period 3 is _____.

A) 18
B) 19.2
C) 20
D) 40