I'm not 100% sure what the question wants as its answer, but having a class of 26 students is around the average number of students in a class.
Hey don’t worry about that grade just keep practicing maths and honestly at one point you’ll start understanding the concepts trust me. Just do it a lot.
So here are my explanations
The answer to this is to try the hardest you can! I believe in you :)
Zero because -12 does not equal 12