Once you've got into analytics you'll see a secondary menu here:
Visit this secondary menu and navigate to and select 'Quiz & Test Results'.
Scroll down until you find a section called 'Individual Student Results':
And search for a student either based on their name, email or you can manually scroll through the different student results for your course.
Once you've found a student you would like to review, click on their name.
You will be redirected to the page with his test results.
Mark the answers accordingly.
Go down to the bottom of the page and make sure you've marked all the answers. Once you've gone through all the questions, click 'Complete test review' to finish reviewing.
You'll see the evaluated result for the student.