I marked both of those tests you did including giving you marks, pointing out where you went wrong and also answering the ones you didn't do. I cut a few corners here and there just to save time so ensure you add all the steps and explain where necessary. Also, in your exam, ensure you read every single question very very carefully EVEN if you've read similar questions a million times before. On top of that, go back and check what the question is asking you and if you answered it correctly.
Other than that, here are the two marked tests: https://file.io/qYZjLj5PdNT1
Hope that helps and good luck with your exam!