Which complex number zzz has the property z2=zˉz^2 = \bar{z}z2=zˉ and ∣z∣=1,z≠1|z|=1, z \neq 1∣z∣=1,z=1?
ei2π/3e^{i2\pi/3}ei2π/3
eiπ/3e^{i\pi/3}eiπ/3
ei4π/3e^{i4\pi/3}ei4π/3
eiπ/2e^{i\pi/2}eiπ/2