Complex number problem

I understand that the set C it the collection of numbers with positive Real and positive Imaginary parts. And B is the set of numbers with lie on the circumference of the circle with centre at 2i and radius 2 but I don't really understand what set of numbers A is
 
I understand that the set C it the collection of numbers with positive Real and positive Imaginary parts. And B is the set of numbers with lie on the circumference of the circle with centre at 2i and radius 2 but I don't really understand what set of numbers A is
What is:

(1- i)*z =? ............ and

Re((1- i)*z) =?
 
I understand that the set C it the collection of numbers with positive Real and positive Imaginary parts. And B is the set of numbers with lie on the circumference of the circle with centre at 2i and radius 2 but I don't really understand what set of numbers A is
If you let z = x + iy, what are the components of (1 - i)z? Set the real part to 2, and graph the equation.
 
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