All of the comments @AlexisUr1 has pointed out have been addressed and an updated version of this course has been posted.  We are also in process of reviewing all of the quiz questions. Bob  

These additional questions have been edited.  We are in the process of having all the quiz questions reviewed.  Thanks for reporting this.

Questions 11 and 12 have been removed from the quiz.  We will have someone review the other questions. Bob