Tolong bantu yah pliiiiiis :)

bilangan cacah yg kurang dari 30

A{1,2,3,4,5}
B{2,3,5,7,11,13,19,23,26,29}
C{3,6,9,12,15,18,21,24,27}
a. {1,2,3,4,5,6,7,}
b. {1,2,3,4,5,6,7}
c. {2,3,5,7,11,13,19,23,16,29}
d. {1,2,3,4,5,6,...29}