Assignment A-w5 is in quiz format, but it counts as an assignment. A-w5 questions are on Brightspace. You have two attempts (no per-question feedback between attempts) and unlimited time per attempt.
The final question is worth 4 points and is NOT auto-graded, so that if you see that your score is 11/15 or 73.33%, you have achieved a perfect score on the remaining auto-graded components (and you are good to stop, unless you want to revise your written response, but you still only get two attempts)