List the elements of the following set :

{x : x ∈ Z and x² ≤ 4}

List the elements of the following set :

{x : 3x - 2 ≤ 10 and x ∈ N}

State which of the following sets are finite and which are infinite :

(i) A = {x : x ∈ Z and x < 10}

(ii) B = {x : x ∈ W and 5x - 3 ≤ 20}

(iii) P = {y : y = 3x - 2, x ∈ N and x > 5}

(iv) M = ${\Big{x:x = \dfrac{3}{n}; n ∈ W \text{ and } 6 < n ≤ 15\Big}}$

Find which of the following sets are singleton sets :

(i) The set of points of intersection of two non-parallel straight lines on the same plane.

(ii) A = {x : 7x - 3 = 11}

(iii) B = {y : 2y + 1 < 3 and y ∈ W}