Reverse a String: Write a function that takes a string as input and returns the string reversed. For example, if the input is "hello", the output should be "olleh". Find the Missing Number: You are given an array of n-1 integers containing numbers from 1 to n with one missing number. Write a function to find the missing number. For example, if the input array is [1, 2, 4, 5, 6], the missing number is 3. Check for Anagrams: Write a function that takes two strings as input and checks if they are anagrams of each other. Anagrams are words or phrases formed by rearranging the letters of another word or phrase. For example, "listen" and "silent" are anagrams.