I'm stuck on the problem below. The problem is from Discrete Mathematical Structures 978-0-13-229751-6

Pg 134.

In Exercises 4 through 12, find the domain, range, matrix, and when A = B, the diagraph of the relation R.

#4. A = { a, b, c, d}, B = {1, 2, 3}, R = {(a, 1), (a, 2), (b, 1), (c, 2), (d, 1)}