Don't understand

what are the domain and range of the function {(5, 3), (7, 1), (11, –2), (4, 9), (–2, 4)}?

a.
domain: {3, 1, 9, 4}; range: {5, 7, 11, 4, }

b.
domain: {3, 1, –2, 9, 4}; range: {5, 7, 11, 4, –2}

c.
domain: {5, 7, 11, 4, }; range: {3, 1, 9, 4}

d.
domain: {5, 7, 11, 4, –2}; range: {3, 1, –2, 9, 4}