1. The 4th grading grade is computed as follows:
40% for the Quiz
30% for Exam
20% for Assignment
10% for Attendance
Therefore 4th grading grade = Quiz*40%+Exam*30%+Assignment*20%+Attendance*10%
2. Format the grades to 2 decimal digit.
3. Rename this sheet to grades.
4. Sort the name according to ascending order.
5. Save this under the same filename.