exam 1 review notebook

sum23/lecture_materials/07_Strings/Exam_1_review.ipynb

sum23/projects/p7/README.md

sum23/projects/p7/images/add_group_member.png

sum23/projects/p7/images/autograder_success.png

sum23/projects/p7/images/gradescope.png

sum23/projects/p7/p7.ipynb

sum23/projects/p7/p7_test.py

sum23/projects/p7/rubric.md

sum23/projects/p7/water_accessibility.csv