3 check-ins using file docs/weeks/4.md version 73d7b71cf2

2023-06-05
13:47
update assignment description and deadline Leaf check-in: a588a58f99 user: jboy tags: revise-for-2023
2023-05-24
20:39
add speaker bio for week 5 check-in: 7fbcf6df3f user: jboy tags: revise-for-2023
2023-04-26
15:47
elaborate description of tutorial #4 check-in: 3446885b67 user: jboy tags: revise-for-2023