Challenging exercises Jaa Sulje 2/14. Exercise 14.11 Avaa lomake 2/14. Exercise 14.12 Avaa lomake 2/14. Exercise 14.13 Avaa lomake 2/14. Exercise 14.14 Avaa lomake 2/14. Exercise 14.16 Avaa lomake 2/14. Exercise 14.17 Avaa lomake 2/14. Exercise 14.18 Avaa lomake