(i) Let R be the relation on the set N of natural numbers given by

R = {(a,b): a – b > 2, b>3}

Choose the correct answer

(a) (4, 1) ∈ R

(b) (5, 8) ∈ R

(c) (8, 7) ∈ R

(d) (10, 6) ∈ R

(ii) If ƒ(x) = 8x^{3} and g(x) = x^{1/3}, findg(ƒ(x)) and ƒ(g(x))

(iii) Let * be a binary operation on the set Q of rational numbers defined by a*b = \(\frac{a}{b}\). Check whether * is commutative and associative?