create a forecast to determine the number of houses the firm will sell over the 2020 calendar year. She pulled the following quarterly sales gures from the last 4 years to use as historical data. Based on the information provided, answer the following questions. Round calculations to at least 3 decimal places. a) What are the seasonal factors for each of the four quarters? (5} b) what is the annual linear regression forecast for 2020? (5] c) Based on the seasonal factors, what are the quarterly forecasts for 2020? (5) d) What would the 2020 linear regression forecasts for quarters 1 through 4 be if the linear regression was based on the quarterly forecasts instead of the annual forecasts? [5)