8 The complex number \(\frac { 2 } { - 1 + \mathrm { i } }\) is denoted by \(u\).
- Find the modulus and argument of \(u\) and \(u ^ { 2 }\).
- Sketch an Argand diagram showing the points representing the complex numbers \(u\) and \(u ^ { 2 }\). Shade the region whose points represent the complex numbers \(z\) which satisfy both the inequalities \(| z | < 2\) and \(\left| z - u ^ { 2 } \right| < | z - u |\).