Write a method that returns the union of two array lists ofintegers using the following header:public static ArrayList<Integer> union(ArrayList<Integer> list1, ArrayList<Integer> list2) For example, the addition of two array lists {2, 3, 1, 5} and {3, 4, 6} is{2, 3, 1, 5, 3, 4, 6}. Write a test program that prompts the user to enter two lists,each with five integers, and displays their union. The numbers are separated byexactly one space. Here is a sample run: Enter five integers for list1: 3   5   45   4   3 ↵EnterEnter five integers for list2: 33   51   5   4   13 ↵EnterThe combined list is 3   5   45   4    3  33   51   5   4   13

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