State which of the following sets are finite, which are infinite :
(i) A = {x : x N, and (x-1) (x - 2) = 0}
(ii) { x : x N and x2 = 25}
(iii) { x: x N, 2x-1 = 0}
(iv) { x : x N, x is prime}
Make correct statement by filling in the symbols ⊂ or ⊄ in the blank spaces :
(i) {2, 3, 4}........{1, 2, 3, 4, 5}