Question

d B D.
B: {−3, −1, 3, 4, 9, 11}
D: {numbers divisible by 3 from 1 to 15}

{3, 9}

{−3, −1, 3, 4, 9, 11}

{ }

{−3, −1, 3, 4, 6, 9, 11, 12, 15}