static seasonal indexes help please

Consider the following two years' demand data for a three-season product. Demand period 1 20 40 Year and season 2019, season 1 2019, season 2 2019, season 3 2020, season 1 2020, season 2 2020, season 3 30 007 WN 4 26 52 40 You are to construct the seasonal indexes (static seasonal indexes), and the associated regression model. (round your answers to two decimal lace at every stage of the calculation where you encounter decimals) The seasonal indexes are S1, S2, and S3; the regression model is = b. + bit Please enter the values as indicated (round your answers to two places of decimal) S1 = S2 = S3 = The following refer to the regression model: The intercept, be The coefficient of time, t, bi