The Owner of Darkest Tans Unlimited in a Local Mall

Multiple Choice

The owner of Darkest Tans Unlimited in a local mall is forecasting this month's (October's) demand for the one new tanning booth based on the following historical data: $$\begin{array} { | l | c | } \hline { \text { Month } } & \text { Number of Visits } \\\hline \text { April } & 100 \\\hline \text { May } & 140 \\\hline \text { June } & 110 \\\hline \text { July } & 150 \\\hline \text { August } & 120 \\\hline \text { September } & 160 \\\hline\end{array}$$
What is this month's forecast using exponential smoothing with alpha = .2, if August's forecast was 145?

A)  144
B)  140
C)  142
D)  148
E)  163