tolong dijawab dong kak, yg no.4 aja

semoga membantuuuuuuuuuuuuuuu

A = {bil. prima antara 20 dan 40}
Maka
A = {23 , 29 , 31 , 37 }
n(A) = 4

B = {x | -3 < x ≤ 10 , x anggota B habis dibagi 2}
Maka
B = { -2 , 0 , 2 , 4 , 6 , 8 , 10}
n(B) = 7