1. In the relation R from A = {0,1,2,3,4} to B = {0,1,2,3}, list down the ordered pairs, and also represent the relations as a matrix and an arrow diagram where (a, b) ? R if and only if
(i) a+b=4
(ii) a \mid b
(iii) lcm(a, b) = 2
(iv) gcd(a, b) = 1
Answer: