Merge pull request #1 from HerryEffendy19/ridwan

Ridwan
menambahkan ScreenSot git log
tugas 4
 menambahkan tugas 5 (Squence diagram)
revisi tugas 5
Merge branch 'master' of https://github.com/HerryEffendy19/IF-C-Kelompok-21 into ridwan