Pls help me before 12 tonight

This is fractions casey shared a pizza with some friends. they each ate 1 third of the pizza. how many people shared the pizza

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

Ineed to know the answer to this algebra question.