prepare for class 5

[brownsarahm]

1. Read these notes and practice with the hardware simulator, try to understand its assembly and walk through what other steps happen. Make notes on what you want to remember most or had the most trouble with in hardwaresurvey.md
2. Review and update your listing of how data moves through a program in your abstraction.md. Answer reflection questions below.
3. Review the commit history and git blame of a repo in browser- what must be in the .git directory for GitHub to render all of that information? (be prepared to discuss this in class)
4. Fill in the Know and Want to know columns for the new KWL chart rows below.
5. Begin your grading contract, bring questions to class Tuesday.