Put New Functional button for CCE : for best Average Calculation : Convert mark from Test

Create 3 Exam 

Exam 1 (10 marks) = 6 marks
Exam 2 (30 marks) = 15 marks
Exam 3 (50 Marks) = 36 marks

Convert
Combine Exam (100 Marks) = Best 2 Exam Average = (6+36 = 42)*100/60 = 70
