Challenging exercises Jaa Sulje 3/11. Exercise 11.21 Avaa lomake 3/11. Exercise 11.22 Avaa lomake 3/11. Exercise 11.23 Avaa lomake 3/11. Exercise 11.24 Avaa lomake 3/11. Exercise 11.25 Avaa lomake 3/11. Exercise 11.26 Avaa lomake 3/11. Exercise 11.27 Avaa lomake 3/11. Exercise 11.28 Avaa lomake 3/11. Exercise 11.30 Avaa lomake