Where I'm doing wrong

Question

https://code.sololearn.com/cDO4hLvIRh6W/?ref=app
So I've been looking at this code and couldn't find the problem?? Where I'm mistaking and how to solve it

Answer 1

Lalala mycar3.year = "1999"; remove the double quotes you will get the output check it

https://code.sololearn.com/cSNOKToaqOiN/?ref=app

Answer 2

You have quotes on line 28 'car3.year = "1999"' . Remove the quotes then it should work.

Answer 3

https://code.sololearn.com/c8XcGxJIfhKj/?ref=app