Hi, sorry for delayed response, you are actually using an obsolete copy of assignment. You need to get a fresh copy and re-do your assignment and see the way you wrote codes, once you get the fresh copy I am confident you will pass the test by yourself.
I am sharing a link on how to get a fresh copy, follow the point 1a (you can save a copy of your current assignment for your referral
Let me know if you need help!! and sorry for delayed response.