Sorry to raise an *extremely* old topic from the dead, i just did a search thingy and found this.
About question two in 4O, what about this example -
Taking the unit circle, z1 = i, z2 = 1, z3 = -i
1/z1 = -i, 1/z2 = 1, 1/z3 = i.
It would seem quite obvious they do not lie on the same line...