Used car dealerships generally have sales quotas that they strive to hit each month, quarter, and calendar year. Consequently, buying a used car toward the end of those periods presents a great opportunity to get a good deal on the car. A local dealership has compiled monthly sales data for used cars (Cars) from 2014-2019. a portion of which Is shown In the accompanying table. Date Cars Jan-14 168 Feb-14 149 Dec-19 165 3. Estimate the linear regression models using seasonal dummy variables with and without the trend term. Which is the preferred model? (Negative values for regression coefcients should be indicated by a minus sign; round your answer to 2 decimal places.) vibasedonli'ievalueof With trend Without trend Based on the value of (adjusted r"2 or rAZ}? I). Use the preferred model to forecast used cars sales in the first two months of 2020. (Round coefcient estimates to at least 4 decimal places and nal answers to 2 decimal places.)