Using java-Write a method that checks if two strings are palindromes. Two strings are palindromes if they contain the same characters but in strict reverse order. For example, “abcd” and “dcba” are palindromes. For the purposes of this method, if either input string is null, the method should return false. If both input strings are empty, the method should return true. The signature of the method should be as follows. public static boolean arePalindromes(String s1, String s2)

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Topological Sort

Topological sort is a sorting technique that sets up a hierarchy in a process. In this technique, when a directed network has nodes connected by arrows, the root node is placed before the successor node.