Consider the function f : AB, where A = { 1 , 2, 3} and B = { a, b, c, d} , shown in the diagram of Figure 5.28. (a) Is f one-to-one? (b) Is f onto?

22. Consider the function f : A B, where A = {1,2,3} and B = {a,b,c,d), shown in the diagram of Figure 5.28. (a) Is f one-to-one? (b) Is f onto? a 2 Figure 5.28: The diagram of the function f in Exercise 22