State which of the following sets are finite or infinite: (i) {x : x ∈ N and (x - 1)(x - 2) = 0} (ii) {x : x ∈ N and x² = 4} (iii) {x : x ∈ N and 2x - 1 = 0} (iv) {x : x ∈ N and x is prime} (v) {x : x ∈ N and x is odd}