how can I find out what are the class share of holders rights are

Since this is not my area of expertise, I searched Google under the key words "class shareholders rights" to get these possible sources:

http://en.wikipedia.org/wiki/Stock
http://links.jstor.org/sici?sici=0023-9186(195821)23%3A2%3C283%3AHFACSR%3E2.0.CO%3B2-B
http://www.lectlaw.com/files/bul05.htm
http://www.investopedia.com/articles/01/050201.asp

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.