Avis is interested in estimating weekly costs of maintenance of its rental cars of a certain size based on these variables: number of miles driven during the week, number of renters during the week, the car's total mileage, and the car's age. A regression analysis is carried out, and the results include n = 45 cars (each car selected randomly, during a randomly selected week of operation), SSR = 7,768, and SST 15,673. Construct a complete ANOVA table for this problem, and test for the existence of a linear regression relationship between weekly maintenance costs and any of the four independent variables considered.