Venn diagrams and set operationsMedium

Sum of Absolute Values in Regions

Let A = {(x, y) ∈ R × R : |x + y| ≥ 3} and B = {(x, y) ∈ R × R : |x| + |y| ≤ 3}.
If C = {(x, y) ∈ A ∩ B : x = 0 or y = 0}, then $\sum\limits_{(x,y) \in C} {|x + y|}$ is :

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