Want to study $8$ hours a day, and $4$ hours on exam days.
Want to study all exams exactly the same amount of time total.
Exams in $10$,$13$,$19$,$20$ days from start.
What is the daily distribution of study per class? Given that it remains the same for the first $9$ days, changes again at $13$ days, $19$ and $20$.
I imagine this $is$ possible to determine
Example:
Day 1 - Day 9
Class 1: 4 hours
Class 2: 2 hours
Class 3: 1 hour
Class 4: 1 hour
Day 11 - Day 13
Class 2: 4 hours
Class 3: 2 hours
Class 4: 2 hours
Day 15 - Day 18
Class 3: 4 hours
Class 4: 4 hours
Sub1=subject 1, Sub2=subject 2, Sub3=subject 3, Sub4=subject 4.
Asuumed that on 10th day you have sub1 exam, on 13th day you have sub2 exam, on 19th and 20th days sub3 and sub4 exams respectively.