Problems for September 2, all from the exam problem collection: 18, 32, 36, 40, 49 a), 117, 118 b) For more review problems -- not to be covered in the seminar -- I recycle from previous years: Do http://www.uio.no/studier/emner/sv/oekonomi/ECON4120/v07/undervisningsmateriale/Oppvarming/mat2v07-1.pdf and problems 1 and 2 from http://www.uio.no/studier/emner/sv/oekonomi/ECON4120/v07/undervisningsmateriale/Oppvarming/mat2v07-2.pdf .