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Language/Type: Java Set collections
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Write a method named numInCommon that accepts two Lists of integers as parameters and returns the count of how many unique integers occur in both lists. For example, if two lists named l1 and l2 contains the values [3, 7, 3, -1, 2, 3, 7, 2, 15, 15] and [-5, 15, 2, -1, 7, 15, 36] respectively, your method should return 4 because the elements -1, 2, 7, and 15 occur in both lists. Use one or more Sets as storage to help you solve this problem. Do not modify the lists passed in.

Type your Java solution code here:

This is a method exercise. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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