1) prompt the user to enter a string of their choosing. output the string. (1 pt) ex: enter a sentence or phrase: the only thing we have to fear is fear itself. you entered: the only thing we have to fear is fear itself. (2) complete the get num of characters() function, which returns the number of characters in the user's string. we encourage you to use a for loop in this function. (2 pts) (3) extend the program by calling the get num of characters() function and then output the returned result. (1 pt) (4) extend the program further by implementing the output without whitespace() function. output without whitespace() outputs the string's characters except for whitespace (spaces, tabs). note: a tab is '\t'. call the output without whitespace() function in main(). (2 pts)