Given the set P = (a = 2K Π + 5 / 6 Π, K ∈ z), the set Q = (b = 2K Π - Π / 6, K ∈ z), then which set does the angle-7 / 6 Π belong to?

Given the set P = (a = 2K Π + 5 / 6 Π, K ∈ z), the set Q = (b = 2K Π - Π / 6, K ∈ z), then which set does the angle-7 / 6 Π belong to?

-7/6 = 2*(-1) + 5/6
So it's P