(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) extend the program by calling the get_num_of_characters() function and then output the returned result. (3) extend the program further by implementing the string_without_whitespace() function. string_without_whitespace() returns the string's characters except for whitespace (spaces, tabs). note: a tab is '\t'. (2 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. number of characters: 46 string with no whitespace: . after you have completed and tested your lab, submit the code of the functions only to zybook for autograding.