You can add a grading score to your first quiz in these easy steps below:
1. Click on the Commerce tab on the left and scroll to Courses.
2. Click on the course that has the quiz you want to modify.
3. Click on the Curriculum tab and then select the quiz you want to modify.
4. Click on the edit button for that quiz on the right.
5. Toggle the radio button that says Graded Quiz. Add the graded point for each question.
6. Click Update Question button below.