Question: Write a method named cumulative that accepts as a parameter an ArrayList of integers, and modifies it so that each element contains the cumulative sum

Write a method named cumulative that accepts as a parameter an ArrayList of integers, and modifies it so that each element contains the cumulative sum of the elements up through that index. For example, if the list passed contains {1, 1, 2, 3, 5}, your method should modify it to store {1, 2, 4, 7, 12}.

Make sure to write just one method, not a whole class

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