I just received assignment 1 back and it seems I was wrong about questions 13, 14, 15. I answered option 3 for all of them as that is how I interpreted their instructions (You may do only one and report the result to the others. Consider the following starting points:
x0 = 1 .1, x1 = 1.3, and x2 = 0.9). I seems you need to only mark q13 with the correct answer and then mark 14,15 with option 5 (none of the above) which make no sense seeing that you need to "report the result to the others" and option 3 for all questions are the same.