Etude 3b - II-V-I in all 7 positions (CAGED+2), Top Four Strings
This shorter version is also an etude I play every day of my life. It takes 3 minutes. The only substantial difference is that Etude 3b is played on only the top 4 strings. When you have this under your fingers, repeat for the middle 4 strings and if you find it useful, on the bottom 4.