As promised, here (exam_20110114_v2) is a sample exam from 2011. The exam has a total value of 46 points because only 4 points from exercise 2 are mandatory, and the extra 2 points value 6 more points. The minimum grade to pass the exam is 18/40 points.
On your request, a brief solution (Solutions_brief_ADC) written in 30 minutes. In 80 minutes, you have time to expand it.