Consider functions f and g which are represented by sets of ordered
pair:
f={(1,a), (2,b), (3,c), (4,d), (5,e) }
g={(b,1.2), (c,2.5), (d,1.2), (e,0), (f,2.5)}
1. Represent g。f as a set of ordered pairs.
2. represent g。f as an arrow diagram
3. Explain how you can use the arrow diagrams for f and g to find the arrow diagram for g。f ?