Below are the first two values of a time series and the first two values of the exponential smoothing forecast. Time Period (t) Time Series Value (Y t) Exponential Smoothing Forecast (F t) 1 18 18 2 22 18 If the smoothing constant equals .3, then the exponential smoothing forecast for time period 3 is . a. 20 b. 19.2 c. 40 d. 18