Let the universe be integers in the range [-5, 10] i.e.,
U = {x ∈ z | -5 ≤ x ≤ 10} let
S = {x ∈ u | ∃k(k ∈ z ∧ x = 3k + 1) } and
T = {x ∈ u | x > 3 } what is T N ?