SOLUTION: https://ibb.co/mcLFXSZ

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Question 1176951: https://ibb.co/mcLFXSZ
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

A’ is all elements in U and not in A, then add all elements from B
so
A’ U B -> region II,III,IV