2) An important source of revenue in Texas is a state sales tax on certain types of goods and services. The data is compiled and used by the comptroller to support future revenue for the state budget. A particular category of goods is classified as retail trade. The following table shows four years of quarterly data (in millions) for the Southeast Texas area: RhymeT Year 1 Year 2 Year 3 Year 4 1 218 225 234 250 2 247 254 265 283 3 243 255 264 289 4 292 299 327 356 a) Calculate seasonal indices for each quarter based on the PMC. b) Remove seasonality from the data and develop a trend line (least squares line) with the data without seasonality. c) Use the trend line to forecast sales for each quarter of year 5. d) Use the seasonal indices toadjust the forecasts found in c) to obtain the final forecasts. 2) An important source of revenue in Texas is a state sales tax on certain types of goods and services. The data is compiled and used by the comptroller to support future revenue for the state budget. A particular category of goods is classified as retail trade. The following table shows four years of quarterly data (in millions) for the Southeast Texas area: RhymeT Year 1 Year 2 Year 3 Year 4 1 218 225 234 250 2 247 254 265 283 3 243 255 264 289 4 292 299 327 356 a) Calculate seasonal indices for each quarter based on the PMC. b) Remove seasonality from the data and develop a trend line (least squares line) with the data without seasonality. c) Use the trend line to forecast sales for each quarter of year 5. d) Use the seasonal indices toadjust the forecasts found in c) to obtain the final forecasts