Belоw yоu аre given the аdjusted seаsоnal indexes for a time series. These values were computed on the basis of 5 years of quarterly data. Quarter Seasonal Index St 1 0.9 2 0.8 3 1.2 4 1.1 The deseasonalized trend for these data is Yt = 127.23 − 1.8t (t represents time, where t = 1 for quarter 1 of year 1 and t = 20 for quarter 4 of year 5). (a) Forecasts for quarters 3 and 4 of year 6 using the trend only. Keep 2 decimal places for the answer. Forecast for quarter 3 Forecast for quarter 4 (b) Forecasts for quarters 3 and 4 of year 6 using the trend and seasonal indexes. Keep 3 decimal places for the answer. forecast for quarter 3 forecast for quarter 4