This exorcise contains only parts a and b a) Using a 3-year moving average, the forecasted registrations (in thousands) for years 4 through 12 are (round your responses to ane decimal place) b) 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 ofher 2 years are each given a weight forecasted registrations (in thousands) for years 4 through 12 are (round your responses to one decimal place)