Below are given 72 observations of the response Y = boy's weight/height ratio, for equally spaced values of the corresponding predictor variable X = age in months. Solve the following question and show your process.

J. (Source: "Nutrition of infants and preschool children in the north central region of the United States of America," by E. S. Eppright, H. M. Fox, B. A. Fryer, G. H. Lamkin, V. M. Vivian, and E. S. Fuller, World Review of Nutrition and Dieterics, 14, 1972, 269-332.) Below are given 72 observations of the response Y = boy's weight/height ratio (W/H ), for equally spaced values of the corresponding predictor variable X = age in months. Assume that the observations fall into two groups: (1) the first seven observations and (2) the remaining 65 observations. Assume, further, that the two groups of data can be explained by two straight line time trends. Using the methods of Section 14.3, find the slopes of the two trend lines and their point of intersection. Plot the data and the fitted lines. Also provide an analysis of variance table, and find and analyze the residuals. WIH Age WIH Age WIH Age 0.46 0.5 0.88 24.5 0.47 0.92 48.5 1.5 0.81 25.5 0.96 0.56 2.5 49.5 0.83 26.5 0.61 0.92 50.5 3.5 0.82 27.5 0.61 0.91 51.5 4.5 0.82 28.5 0.67 0.95 5.5 0.86 52.5 0.68 29.5 0.93 6.5 0.82 53.5 30.5 0.93 0.78 54.5 7.5 0.85 31.5 0.69 0.98 8.5 55.5 0.88 32.5 0.74 0.95 9.5 56.5 0.86 33.5 0.77 0.97 10.5 0.91 57.5 34.5 0.78 0.97 11.5 58.5 0.87 35.5 0.96 0.75 12.5 59.5 0.87 36.5 0.97 0.80 13.5 60.5 0.87 0.78 14.5 37.5 0.94 0.85 38.5 61.5 0.96 0.82 15.5 62.5 0.90 39.5 0.77 1.03 16.5 63.5 0.87 40.5 0.99 0.80 17.5 64.5 0.91 41.5 1.01 65.5