Which graph correctly shows point A representing z1 - z2 on a complex plane where Z1 and z2 are complex numbers?

I'm terrible at math any here is appreciated.

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.