Let \(z = {\left( {\frac{{\sqrt 3 }}{2} + \frac{i}{2}} \right)^5} + {\left( {\frac{{\sqrt 3 }}{2} - \frac{i}{2}} \right)^5}\). If R(z) and I(z) respectively denote the real and imaginary parts of z, then:

Let \(z = {\left( {\frac{{\sqrt 3 }}{2} + \frac{i}{2}} \right)^5} + {\

1.	Let \(z = {\left( {\frac{{\sqrt 3 }}{2} + \frac{i}{2}} \right)^5} + {\left( {\frac{{\sqrt 3 }}{2} - \frac{i}{2}} \right)^5}\). If R(z) and I(z) respectively denote the real and imaginary parts of z, then:
A.	I(z) = 0
B.	R(z) > 0 and I(z) > 0
C.	R(z) < 0 and I(z) > 0
D.	R(z) = -3
Answer» B. R(z) > 0 and I(z) > 0