If $\bar { z }$ denotes the conjugate of $z$, what is the non-zero complex number $z$ that satisfies the equation $z ^ { 2 } = \bar { z }$ and whose argument is between $\frac { \pi } { 2 }$ and $\pi$?
A) $\frac { - 1 } { 2 } + ( \sqrt { 3 } ) \mathrm { i }$
B) $\frac { - 1 } { 2 } + \left( \frac { \sqrt { 3 } } { 2 } \right) \mathrm { i }$
C) $\frac { - \sqrt { 2 } } { 2 } + \left( \frac { 1 } { 2 } \right) \mathrm { i }$
D) $\frac { - \sqrt { 2 } } { 2 } + \left( \frac { \sqrt { 2 } } { 2 } \right) i$
E) $\frac { - \sqrt { 3 } } { 2 } + \left( \frac { 1 } { 2 } \right) \mathrm { i }$

Let z be a complex number satisfying the equality
$$i \cdot z + 1 = 2 ( 1 - \bar { z } )$$
What is the real part of the complex number z?
A) $\frac { 1 } { 6 }$
B) $\frac { 1 } { 4 }$
C) $\frac { 1 } { 2 }$
D) $\frac { 2 } { 3 }$
E) $\frac { 5 } { 6 }$

$4 z - 3 \bar { z } = \frac { 1 - 18 i } { 2 - i }$\ Which of the following is the complex number $z$ that satisfies this equality?\ A) $- 2 + i$\ B) $- 3 + i$\ C) $4 + 2 i$\ D) $3 - 2 i$\ E) $4 - i$

Let $\bar{z}$ be the conjugate of the complex number $z$,
$$\frac { 6 + 2 i } { z } = \bar { z } + i$$
the sum of the complex numbers $z$ that satisfy the equality is what?
A) $1 + 3 i$
B) $2 + i$
C) $3 + 2 i$
D) $4 + i$