Увеличим на 8 числа:
$$9 + 8 = 17$$
$$12 + 8 = 20$$
$$18 + 8 = 26$$
$$34 + 8 = 42$$
$$50 + 8 = 58$$
$$75 + 8 = 83$$
$$83 + 8 = 91$$
$$62 + 8 = 70$$
Увеличим в 8 раз числа:
$$9 \cdot 8 = 72$$
$$5 \cdot 8 = 40$$
$$6 \cdot 8 = 48$$
$$4 \cdot 8 = 32$$
$$7 \cdot 8 = 56$$
$$6 \cdot 8 = 48$$
$$10 \cdot 8 = 80$$
$$1 \cdot 8 = 8$$
Ответ: 1) 17, 20, 26, 42, 58, 83, 91, 70; 2) 72, 40, 48, 32, 56, 48, 80, 8.