John is responsible for coming up with a forecast of the number of visitors to Metro Zoo. He has gathered the following data on the number of visitors over the last seven weeks:

Week	Week 1	Week 2	Week 3	Week 4	Week 5	Week 6	Week 7
Visitors	620	730	880	700	830	1,020	900

Based on the data above, what is John’s forecast of the number of visitors for week 8 using each of the following methods?

1. Naïve forecast.

2. A three-period moving average

3. A five-week weighted moving average using a weight of 0.3 for t-1 (i.e., one period before), 0.25 for t-2 (i.e., two periods before), 0.2 for t-3 (i.e., three periods before), 0.15 for t-4 (i.e., four periods before) and 0.1 for t-5 (i.e., five periods before).

4. An Exponential Smoothing method, assuming that the forecast for week 5 was 900, using a value of 0.3 for .