Consider the following estimated models: Model 1: y = 24 + 4.50x Model 2: y = 4.3 + 23 In(x) Model 3: In(y) = 3.0 + 0.10x, Se = 0.07 Model 4: In(y) = 2.6 + 0.60 In(x); Se = 0.20 a. Interpret the slope coefficient in each of the above estimated models, when x increases by one unit in Models 1 and 3 and by 1% in Models 2 and 4. (Round your answers to 2 decimal places.) Model 1: 0 by units Model 2: y by about units Model 3: y by about percent Model 4: y by about percent. b. For each model, what is the predicted change in y when x increases from 10 to 10.3? (Do not round intermediate calculations. Round final answers to 2 decimal places.) Model 1: y by units Model 2: y by units Model 3: y by percent. Model 4: y by percent