Discrete Structure - Old Questions

6 How can you represent relations using matrices? Suppose that A= {1, 2, 3} and B= {1, 2}. Let R be the relation from A to B containing (a, b) if a ∈A, b ∈B, and a > b. What is the matrix representing R if a₁= 1, a₂= 2, and a₃= 3, and b₁= 1 and b₂=2?     (2.5+2.5)