Hi Dr. Bastian Bohn, Here in the attachment is the solution from our group. Members are: Xinda Wu:                                        s6xiwuuu@uni-bonn.de   Juleana Lucia Villegas Segura:       s6juvill@uni-bonn.de We both completed 1-4 individually and I did 5-7, while Juleana 8-9. Best, Xinda