is exercise contains only parts a and b. Using a 3-year moving average, the forecasted registrations (in thousands) for years 4 through 12 are (round your responses to one deci ace): Y - Using a 3-year weighted moving average in which the registrations in the most recent year are given a weight of 2, and registrations in the her 2 years are each given a weight of 1 , the forecasted registrations (in thousands) for years 4 through 12 are (round your responses to cimal place)