Identify the real and imaginary parts of the given number. Then identify whether the number belongs to each of the following sets: real numbers, imaginary numbers, and complex numbers. −9 + 9i
The real part of −9 + 9i is _ and the imaginary part is _.
The number −9 + 9i belongs to which of the following sets. Select all that apply.

A real numbers
B imaginary numbers
C complex numbers

See image.