a. Write a program that uses the function isPalindrome given in Example 6-6 (Palindrome). Test your program on the following strings: “madam”, “abba”, “22”, “67876”, “444244”, and “trymeuemyrt”
b. Modify the function isPalindrome of Example 6-6 so that when determining whether a string is a palindrome, cases are ignored, that is, uppercase and lowercase letters are considered the same.