For the prediction equation of a seasonal time series provided here, answer the questions below. The data started at season 3 (t=1 was season 3). Y = 100 - 30*Period - 6*Season2 - 1*Season3 + 5*Season4. The seasonal variables are categorical.

2.1 How many seasons are there per cycle?

a. 4

b. 3

c. Impossible to answer

d. None of the above

2.2 Write the prediction equation for time "t" and season1.

a. 100 - 30*t +(- 6 - 1 + 5) Season1

b. 100 - 30*t - 6*(Not season 2)

c. 100 - 30*t - 1

d. None of the above

2.3 Forecasts for season 2 and 3 are performed within the same cycle. What is the difference between these two fore