Tolong jawab dong yaa

a. A U B = {1,2,3,4,5,6,7,8}
b. A U C = {1,2,3,4,5,6,7,8}
c. A U D = {1,2,3,4,5,6,7,8}
d. B U C = {1,2,3,4,5,7}
e. B U D = {1,3,4,5,6,7}
f. C U D = {1,2,3,4,5,6,7}