. Write a function that recognizes palindromes. (Hint: use your reverse function to make this easy!): test(is_palindrome("abba")) 2 test(not is_palindrome("abab")) 3 test(is_palindrome("tenet")) 4 test(not is_palindrome("banana")) 5 test(is_palindrome("straw warts")) 6 test(is_palindrome("a")) 7 # test(is_palindrome("")) # Is an empty string a palindrom 11. Write a function that counts how many times a substring occurs in a string: 12. Write a function that removes the first occurrence of a string from another string: e?