8. (9 points). The actual levels of the 4 design factors are…

8. (9 points). The actual levels of the 4 design factors are as follows: A (10, 20), B (5,7), C (50, 100) and D (20, 30).  Suppose that the experimenter selects a model with the terms A, D, and the AD interaction. The predicted response from this model when these factors are at levels A = 16, D = 26 is