1. Write a function that receives a string of characters. This function display each character in the string with one character per line.
2. Write a function that receives a string of characters and displays all the character in the string in a reverse order.
3. Write a function that receives a string of characters and a single character. The function counts and returns the number of occurrences of this single character.
4. Write a function that receives a string of characters that contains a few words separated by blank spaces. This function has no return value. It changes the initial of each word in the string to up case letter.
5. Write a function that receives a string of characters. The function has no return value. All this function does is to delete all the blank spaces contained in the string.