Berta is on the left, Gertude in the far...  Gertude is the lecturer and observing Berta work with test-tubes. Berta had screwed up in previous tests so she now cannot be left unattended. She's a dumbass. They are thinking about what they are studying, they feel exhausted, like I do right now. Berta will do what she needs to do to get the study done and will regain the trust of the department. 
