Using the Body Fat data set with body density as the response variable and abdomen circumference as the explanatory variable

(a) fit a simple linear regression model relating density to abdomen circumference.

(b) create a residual plot for the residuals associated with the fitted model.

(c) create a normal probability plot for the residuals from the fitted model.

(d) assess the validity of the simple linear regression model assumptions.

(e) create a fitted line plot for the simple linear regression model relating density to abdomen circumference.