$6\mathrm{.}31($Palindromes$)$ A palindrome is a string that's spelled the same way forward and backward. Some

examples of palindromes are: "radar," "able was i ere i saw elba," and, if you ignore blanks, "a man a

plan a canal panama." Write a recursive function testPalindrome that returns $1$ if the string stored in the

array is a palindrome and $0$ otherwise. The function should ignore spaces and punctuation in the string. Please write the recursive function in the C programming language.