What must be done before using ArrayLists?

(This is Java Programming btw)

Andrina writes letters that are regularly sent to hundreds of her company’s customers. because of this, she would like for the mail merge command to be in her quick access toolbar, and she wants it to be the first button on the left. what should andrina do to place the mail merge button there?

If an improvement creates no significant change in a product’s performance, then it is a(n) ? a0 design improvement. (there are no answer choices)

What is the difference between the internet and the world wide web?