Project on Matlab Programming modification.

Write a program which asks the student to choose between the summation exam and subtraction exam.

In the summation or subtraction exam the student will be asked ten times to sum or subtract two single digit random integer numbers

Check his answers, If the student answers $80\%$ or more of the questions correctly he will pass otherwise he will be asked if he would like to get the exam again, If his answer is ok repeat the exam for him.

If the student failed to success two times do not ask him to repeat the exam and till him that he should study well before getting the exam again.

Note:

If the student answers the first five simultaneous questions correctly give him $100\%$ score and terminate the exam.