Moving average and exponential smoothing

____________ moving averages react more slowly to recent demand changes than do ____________ moving averages.
Longer-period / shorter-period
Shorter-period / longer-period
Longer-period / longer-period
Shorter-period / shorter-period

In exponential smoothing, the closer alpha is to _________, the greater the reaction to the most recent demand.
-1
0
1
-1 or 1

Accurate solutions to the problem is provided.