10.20 Blue jay morphology: Sex and size. The dataset in the file BlueJays includes Head (head length, in mm) and Mass (in gm) for a sample of blue jays. We want to study the relationship between sex (coded as M/F in the variable KnownSex and as 1/0 in the variable Sex) and these measurements. . Bluday a. Make parallel boxplots of Head by KnownSex and Mass by 1299 KnownSex Which of these two predictors has the strongest relationship with KnownSex? b. Fit a simple logistic regression model on Sex depending on Mass. What is the P-value for testing that Mass has no predictive power? a Fit a multiple logistic regression model of Sex depending on Mass and Head. Which is the P-value for the coefficient of Mass in the multiple logistic model