Give the domain and range of each relation. Tell whether the relation defines a function a. {(13,12), (8, -3), (15,14), (5,17)}

b. {(3,21), (5, -11), (15,20), (3,4)}

c. {(9, -11), (5, -8), (21,1), (7, -4)}

d. {(19, -7), (10, -3), (1,7), (19,17)}

e. {(7,12), (11, 5), (14,12), (6, -1)}

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