1. psychology   Philosophie   Psychologie   Biologie   Algebra   Hint Half-n-half Clue   2. biology   Infinitesmalrechnung   Trigonometrie   Geometrie   Biologie   Half-n-half Clue   3. botany   Botanik   Chemie   Physik   Geometrie   Half-n-half Clue   4. calculus   Infinitesmalrechnung   Trigonometrie   Biologie   Philosophie   Half-n-half Clue   5. astronomy   Psychologie   Botanik   Astronomie   Algebra   Half-n-half Clue   6. trigonometry   Biologie   Trigonometrie   Psychologie   Astronomie   Half-n-half Clue   7. zoology   Zoologie   Botanik   Astronomie   Trigonometrie   Half-n-half Clue