Part 2: grammar
exercise 4: 2 points (0.5 point for a good answer)
exercise 5: 2 points (0.5 point for a good answer)
exercise 6: 2 points (0.5 point for a good answer)
exercise 7: 6 points (1 point for a good answer)
exercise 8: 3,5 points (0.5 point for a good answer)