Set {x : x = n² - 1, x ∈ Z (integers) and 2 < n ≤ 5} is equal to :

1. {8, 15, 24}

2. {3, 8, 15}

3. {3, 8, 15, 24}

4. none of these

Write the following set in roster (Tabular) form :

A₂ = {x : x² - 4x - 5 = 0 }

Write the following set in roster (Tabular) form :

A₃ = {x : x ∈ Z, -3 ≤ x < 4}