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.