Consider the following estimated trend models. Use them to make a forecast for t = 19. a. Linear Trend: y = 14.19 + 1.07t (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) b. Quadratic Trend: 18. 96 + 0.91t - 0. 04t (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) c. Exponential Trend: In(y) = 1.5 + 0.05t, s = 0. 03 (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)