Being a considerate father, I am planning a monetary incentive scheme to improve my 18-year-old son’s marks at school. Instead of executing a relative’s bequest as decreed, I intend to spend the €7,000 rewarding good results. During three semesters, he will have to pass 48 preliminary tests, then the main exams in the fourth and last semester. How should I divide up the capital?
Robert Saverin, a grateful father

Dear Mr Saverin,