The data for the number of hand-held gaming devices sold for the past 5 weeks are 15 units, 20 units, 25 units, 30 units, and 17 units respectively. The time series appears to be relatively stable, without trend, seasonal, or cyclical effects; thus, a moving average model would be appropriate. Setting k = 3 and a weighting scheme of weight 3, 2, and 1 respectively to last week, two weeks ago, and three weeks a go data, the three-period weighted moving average forecast for week 6 (rounded to one decimal place) is ________.

• A. 25.3 units
• B. 22.7 units
• C. 12
• D. 17.8 units