1.Yes.／Yes,we are.
2.I'll try to discover my own advantages.
Don't look at things from a single point of view.Everyone is born equal.
I should believe I can do what others do.
We should believe we can do better than others in some ways／subjects.
3.Why can't we do better than others?
4.记住自信是通向成功的第一步.
5.Believe in yourselves,and you will be successful one day.
We should try to improve our self-confidence.
We shouldn't give up in the face of competition.
We should be filled with／full of confidence.
(答案不唯一)