Question: Modify the method of Exercise E18.15 so that the second array list can contain elements of a subclass. For example, if people is an

Modify the method of Exercise • E18.15 so that the second array list can contain elements of a subclass. For example, if people is an ArrayList and students is an ArrayList, then append(people, students) should compile but append(students, people) should not.

Data from exercise E18.15

Provide a static method void append(ArrayList

a, ArrayList

b) that appends the elements of b to a.

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