Let A, B, C be three sets of complex numbersas defined below $$A = \left\{z : Imz \geq 1\right\}$$ $$B = \left\{z : \mid z - 2 - i \mid = 3\right\}$$ $$C = \left\{z : Re((1 - i)z) = \sqrt{2}\right\}$$
Question 21
The number of elements in the set $$A \bigcap B \bigcap C$$ is