Exercise $4\mathrm{.}8\mathrm{.}4$ in the course book asked you to implement a function that decides whether a string is a palindrome without modifying the input string.

Write your code below. The function should:

be named is$\_$palindrome

accept a single string parameter

return a Boolean: True if the string is a palindrome; False otherwise.

Your program should consider uppercase and lowercase letters as different, so 'anna' is a palindrome, 'Anna' is not.

You can use the tests below to help check if your code is working. NOTE that failing the tests is a clear indication you code is faulty, but passing the tests is NOT a guarantee it is correct. Your tutor may run additional tests.