A Palindrome is a word that is the same reading forward or backward. For example, each of the following words is a palindrome: Madam, Civic, Level. Noon, Refer, Wow. Note that the words are not case-sensitive. Write a C program that Declare an array of twenty characters. In a loop, get single characters from the user and store them in the array. After user ends the inputs, check that the characters entered by the user creates a palindrome or not and provide proper message like the sample execution provided. Note: In this program, you are not allowed to use pointers and String functions. The only standard functions you can use are toupper() and tolower() from the ctype library to convert a single character to its corresponding uppercase or lowercase letters, respectively. Sample Execution 1: Enter a word as single characters: Enter the EOF character to end the input. Madam Madam is a Palindrome. Sample Execution 2: Enter a word as single characters: Enter the EOF character to end the input. Adam Adam is not a Palindrome. Sample Execution 3: Enter a word as single characters: Enter the EOF character to end the input. S s is a Palindrome