Some examples of apostrophes used to show joint and individual ownership would be the following:
Foster and Lydia’s first class of the day is math.
Eunice and Tony’s parents are both soccer coaches.
Marcel and Lacy’s neighborhood is having an egg hunt on Saturday.
Kyree’s and Everett’s fathers went to high school together.
Christina’s and Amir’s bikes were both locked up in front of the library.
Judy’s, Marie’s, and Hector’s quizzes all had perfect scores.