23. Let W = X2iy2 C1iy1 and z = a) Show that the distance WZ between the points w and z is z - w. (b) Show that the angle that the line WZ makes with the positive real axis is arg(z - w).

Hi, parts a) and b) of this question are attached.

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Extracted text: 23. Let W = X2iy2 C1iy1 and z = a) Show that the distance WZ between the points w and z is z - w. (b) Show that the angle that the line WZ makes with the positive real axis is arg(z - w).