Below Are the First Four Values of a Time Series $\begin{array} { l l } \text { Time Period } & \text { Time Series Value } \\1 & 18 \\ 2 & 20 \\ 3 & 25 \\ 4 & 17 \end{array}$

Multiple Choice

Below are the first four values of a time series.

$\begin{array} { l l } \text { Time Period } & \text { Time Series Value } \\1 & 18 \\ 2 & 20 \\ 3 & 25 \\ 4 & 17 \end{array}$ Using a four-period moving average, the forecasted value for period 5 is _____.

A) 2.5
B) 17
C) 20
D) 10