Question License

Question ID 4702 (Universal ID 1424077394266362)

This question was written by Gaa,Julia, derived from work by Lippman,David, mb Staab,Nikolai, mb Auer,Alexander. This work is licensed under the IMathAS Community License (GPL + CC-BY).
The code that generated this question can be obtained by instructors by emailing dahn@vcrp.de.