Consider the following trend models estimated from 20 observations. Use them to make a forecast for y at t=20. a. Linear Trend: =11.55 +1.31 Note: Do not round intermediate calculations. Round final answers to 2 decimal places. 9= b. Quadratic Trend: 18.77 +0.92t - 0.04+2 Note: Do not round intermediate calculations. Round final answers to 2 decimal places. c. Exponential Trend: In(y) = 1.6+0.06t se - 0.01 Note: Do not round intermediate calculations. Round final answers to 2 decimal places.