Problem 17.10 (2 points) Life insurance companies are keenly inter ested in predicting how long their customers will live because their premiums and protability depend on such numbers. An actuary for one insurance company gathered data from 100 recently deceased male customers. He recorded the age at death of the customer plus the ages at death of his mother and father, the mean ages at death of his grand mothers, and the mean ages at death of his grandfathers. a. Perform a multiple regression analysis on these data. b. Is the model valid