added ex3
Update README.md

...
Update README.md
added ex4
Merge branch 'master' of github.com:codex-academy/codeX_ProgrammingExercises
Update README.md
Update README.md
Update README.md

layout fixes
Exercise One
Updating changes
Merge branch 'master' of https://github.com/NdaJunior/codeX_ProgrammingExercises

-m "Attempting to get access to exercises 3 and 4"