Need some help with this.
A contractor's records during the least five weeks indicate the number of job requests:
Week 1 2 3 4 5
Request 22 26 15 23 21
Predict the number of requests for week 4, week 5, week 6 using each of the following methods:
1) 3 - period moving average
2) 4-period moving average
3) Weighted moving average using 0.60, 0.30 and 0.10 assuming highest weight to the most recent week
4) Exponential smoothing with α = 0.30; use 22 for week 2 forecast.