Maria, Imma, Sonia, Chiara, Aleksandra

Have a look to this paper and solve the problem: 

https://drive.google.com/open?id=0B0rVayd5faSPTExqYThYU3RTSTg

When you have answered to all the questions, prepare a presentation to show to your mates the results you obtained and explaining them how you got them.

Discuss with the other group having to solve the same task and compare the results.