The president of State University wants to forecast student enrollment for this academic year based on the following historical data:
|5 years ago||15,000|
|4 years ago||16,000|
|3 years ago||18,000|
|2 years ago||20,000|
What is the forecast for this year using exponential smoothing with alpha = 0.5, if the forecast for two years ago was 16,000?