in C language, please

Write a C program that prompts the user to enter a character, then check whether this character is an alphabet, digit or special character. You should implement 3 functions: a) isAlphabet, that receives a character and returns 1 if the character is an alphabet (alphabet letters are all lowercase letters (a-z) and uppercase letters (AZ)). Otherwise, returns 0. b) is Digit, that receives a character and returns 1 if the character is a number (numbers are (0-9)). Otherwise, returns 0. c) isSpecialChar, that receives a character and returns 1 if the character is a special character. Otherwise, returns 0. [Hint: you can call the previous functions]