Excersis 1 clik here
https://docs.google.com/document/d/1-KVciHFmEx7jJHfFa1ru9pmbuvVfNXPb7r9Mn53Zlrg/edit
Excersis 2 clik here
https://docs.google.com/open?id=0B0YK_P-ClmKHNTIyZmNmYzktZDU1Ny00YTNjLTllMGQtODU2M2ZjM2QwNDY1
Excersis 3 clik here
https://docs.google.com/document/d/11OLUuBMHn6KmJJInrduFmX789IZFtXPKVwgHRdUOPik/edit
Excersis 4 clik here
https://docs.google.com/open?id=0B0YK_P-ClmKHNjEwNDVkM2YtNThlZS00YWM1LWFmMjUtMmEwODRhNzA1Y2I0
