Football and Brain Size Exercise 2.143 on page 102 introduces a study that examines several variables on collegiate football players, including the variable Years, which is number of years playing football, and the variable Brain Size, which is volume of the left hippocampus in the brain measured in μL. Figure 2.72 shows a scatterplot of these two variables along with the regression line. For each of the following cases, estimate from the graph the number of years of football, the predicted brain size, the actual brain size, and the residual.

(a) The case with 18 years of football experience.

(b) The case with the largest positive residual.

(c) The case with the largest negative residual.