We'll cover Sections 1 - 5.
Naval.RData contains the workspace - including the crx1 variable (cube root of x1).
Naval.R is the script for sections 1 and 2. Diagnostics.pdf is the output (handed out) for those sections.
Leverage.R is the script for sections 3 and 4. Leverage Influence.pdf is the output (handed out) for those sections.