Question

For each pair of functions, find f g and g of, if they exist.
16. f= {(-9, -1), (-1,0), (3, 4)}
g={(0, -9), (-1, 3), (4, -1)}
a. does not exist; {(-9, -1), (-1, 0), (3,4)}
b. {(0, -9), (-1, 3), (4, -1)}; {(-9, -1), (-1, 0), (3,4)}
c. {(0,4), (-1,-9), (4,3)}; {(0, 3), (-1, 4), (3, -9)}
d. {(0, -1), (-1, 4), (4, 0)}; {(-9, 3), (-1,-9), (3, -1)}