Bantuin pleaseeee ,jelas gaa gambarnya?

16) P = {1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 72}
     Q = {1, 3, 5, 7, 15, 3 5, 105}
     P U Q = b. {2, 3, 5, 7}
17) a
18) b
klo slah jgn marah