Reference: Potthoff, R.F. and Roy, S.W. (1964). A generalized multivariate analysis of variance model useful especially for growth curve problems. Biometrika, 51, 313-326 The data are from a study of dental growth measurements of the distance (mm) from the center of the pituitary gland to the pteryomaxillary fissure were obtained on 11 girls and 16 boys at ages 8, 10, 12, and 14. The data can be found in Dental growth.txt file. Variable List: ID, Gender, Age 8 Response, Age 10 Response, Age 12 Response, Age 14 Response. Note: Response is measurements of the distance (in millimeters) from the center of the pituitary to the pteryomaxillary fissure. Investigators are interested in several aspects of the response over time. They would like to know if there is a common trend for both groups (Gender) over time or if groups differ with respect to trend over time. They are also interested in determining if the change in response (distance from center of the pitutary to the preyomaxillary fissure) from Age 8 to the end of the study is the same for both gender. 1. On a single graph, construct a time plot that displays the mean strength versus time (in years) for