Match each of the set on the left in the roster form with the same set on the right described in set-builder form:
(i) {1,2,3,6} ↔ (a) {x:x is a prime number and a divisor of 6}
(ii) {2,3} ↔ (b) {x:x is an odd natural number less than 10}
(iii) {M,A,T,H,E,I,C,S} ↔ (c) {x:x is natural number and divisor of 6}
(iv) {1,3,5,7,9} ↔ (d) {x:x is a letter of the word MATHEMATICS}