a.First, the answers I uploaded on the quiz are being showed on the Preview even though the button Let student view the answer is NOT checked.
b. There is no way I can add a picture to the quiz. I changed the file extension, I used images from my files, files from the internet but there is no way they can be seen under preview or under instructors view.
c. When I try to preview the test using the Test Student, as somebody suggested in one of the blogs, the Test Student is not an available option to me when I go to Assign to. Just the students names are available.