Probability Problem: Lottery Tickets

**Hello everyone!**

**I have been working on (or rather, looking at) this problem for hours on end, and I am still unable to complete it. For a textbook question, it seems quite difficult to me. What is wrong with me? Any help soon is greatly appreciated. Thank you in advance!**

*100 tickets are sold in a raffle in which there are 2 prizes. If you buy 5 tickets, what are the chances of you winning:*

*a.Both prizes?*

*b.Neither prize?*

*c.At least one prize?*

(Doh)(Itwasntme)(Angry)