Concepts.

a) Which will be smoother, a 50-day or a 200-day moving average?

b) Which will be smoother, a single exponential smoothing

(SES) model using a = 0.10 or a model using a = 0.80?

c) What is the difference in how historical data are used when the smoothing coefficient in a single exponential smoothing (SES) model is raised from 0.10 to 0.80?