2 check-ins using file docs/weeks/2.md version 5f8b6f4ea6

2021-04-07
19:36
clarify homework assignment in week 4 check-in: 4d908425f5 user: jboy tags: trunk
19:36
add assigned readings for weeks 2 and 3 check-in: 3e4193e66a user: jboy tags: trunk