The complex number \(\frac{2}{-1+i}\) is denoted by \(u\).

(i) Find the modulus and argument of \(u\) and \(u^2\).

(ii) 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 \(|z-u^2| < |z-u|\).