Let the universe be integers in the range [-5, 10], i.e., u = x ∈ Z | -5 ≤ x ≤ 10. Let s = x ∈ u | ∃ k ∈ Z, x = 3k + 1 and t = x ∈ u | x > 3. What is t ∩ (complement of s)?