Typo in the mandatory assignment

There is a small typo in the final exponent in Exercise 2d of the mandatory assignment. In the previously posted version of the assignment, the exponent was \lambda L, the correct expression is - \lambda L. This has now been corrected, and a new version of the assignment is posted here: English and Norwegian. The typo has consequences for exercise 2e as well. 

We apologise for the error, and will take this into account when correcting the assignments.