Determine which of the following situations requires the distributive property in order to simplify the expression. Select all situations that apply.

x(2y)
9(x ∙ y)
9(x + y)
(7 ∙ a)(b)
(7 - a)(b)
(2 ∙ x) ∙ y

*(OML PLEASE HELP ME ON THIS IT'S DRIVING ME NUTS!)*