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nework Assignment Chapter 18 a 4 Six years of quarterly data of a seasonally adjusted series are used to estimate a linear trend model as T 1: 197.00 + 1.3621 In- addition, quarterly seasonal indices are calculated as 1= 0.84, 2 = 0.82, S" 3 =1.03,and 4 = 1.08. 3-1. Interpret the rst quarterly index. In other words, what is the value of the series in the rst quarter as compared to the average? arms '9 16% below eBook O 16% above 0 84% above Print 0 84% below References a-2. Interpret the fourth quarterly index. In other words, what is the value ofthe series in the fourth quarter as compared to the average? 0 92% below 0 8% below 0 92% above 8% above b. Make a forecast for all four quarters of next year (Do not round intermediate calculations. Round your answers to 2 decimal places.) yr Quarter 1 Quarter 2 Quarter 3 Quarter 4 %