4.Question 4Which line of code outputs the string "invalid username" to the screen?1 point# print("invalid username")print("invalid username")print(#invalid username#)print(invalid username)

4.Question 4Which line of code outputs the string "invalid username" to the screen?1 point# print("invalid username")print("invalid username")print(#invalid username#)print(invalid username)

What is wrong with the following code?for username in failed_login:print(username)

You included username_list[10] in your code, but username_list only contains five elements. What type of error is this?1 分Syntax errorLogic errorExceptionName error

For t5he above code please correct it as Generate User Name Fix getUserName so that it returns the user’s name as "LastName, FirstName" (without the quotes). Capitalise the first letter of the first and last names If the lastname is null, just return firstname without a comma e.g. "John" "Smith" should return "Smith, John"

Given the following lines of code, which of the following is the result of a user entering ABCDEFG when prompted?String stringValue = input.nextLine();char singleChar = stringValue.charAt(0);System.out.println(singleChar);a.)Bb.)Errorc.)Ad.)0