Given two stacks of textbooks of the following subjects {“Chemistry”, “Mathematics”, “Biology”, “English”} and {“Biology”, “English”, “Geography”, “Physics”}, find the subjects that are (1) only...

Given two stacks of textbooks
of the following subjects {“Chemistry”, “Mathematics”, “Biology”,
“English”}
and {“Biology”, “English”, “Geography”, “Physics”},
find the subjects that are (1) only present in the first stack; (2) only present in
the second stack; (3) present in both stacks.