(1) the range of the following relation: r: {(3, -2), (1, 2), (-1, -4), (-1, 2)} is
a- {-1, 1, 3}
b- {-1, -1, 1, 3}
c- {-4, -2, 2, 2}
d- {-4, -2, 2}

(2) the domain of the following relation: r: {(3, -2), (1, 2), (-1, -4), (-1, 2)} is
a- {-1, 1, 3}
b- {-1, -1, 1, 3}
c- {-4, -2, 2, 2}
d- {-4, -2, 2}