A. Evaluate the residuals from the analysis of covariance you performed in Problem 11.9. Do they meet the assumption of a linear relationship between the response, F, and the covariate, L? If not, reformulate the problem to conduct an analysis of covariance, while accounting for a nonlinearity. B. Test the assumption of parallel relationships between F and L (line or curve, depending on the result of part A of this problem). Are the lines (or curves) parallel? If not, how do you interpret the analysis of these data?