\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Plot the points \(A\), \(B\), \(C\), and \(D\) with respective affixes \(z_A = 2-2i\), \(z_B = 1\), \(z_C = 3+i\), and \(z_D = 4-i\).
Conjecture the nature of the quadrilateral \(ABCD\).

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