Math help! *10 points!* Polynomials and Zeros?

I have the answers to these two problems in the back of the book, but I need to know HOW to do them. PLEASE help :)

*Find a polynomial function that has the given zeros:*
4, -3, 3, 0

and

*Find a polynomial of degree "n" that has the given zeros:*
(Zeros are -5, 0, 1) and (Degree is n=3)
3 answers 3