Update to X in STEP and README.md

Merge pull request #3 from Exp-Communicate-Using-Markdown-Cohort-1/start-markdown

Update to 5 in STEP and README.md

Update to 5 in STEP and README.md

Update index.md

Update to 4 in STEP and README.md

Update to 4 in STEP and README.md

Update index.md

Update to 3 in STEP and README.md

Update to 3 in STEP and README.md

Update index.md

Update to 2 in STEP and README.md

Update to 2 in STEP and README.md

Update index.md

Update to 1 in STEP and README.md