find an nth degree polynomial function w/ real coefficients satisfying the given conditions:

1. n = 4; -2,-1/2, and i are zeros; f(1)=18

2. n = 4; -4, 1/3, and 2 +3i are zeros; f(1)=100

I had a brain fart and don't remember how to do polynomial functions with fractions, I would like help to figure out what to do though.

Thanks!