What function do you use to replace all letters?

Question

I used “Hay!”.replace(“a”,”e”)
But if I added more, it would only replace first a.
Can you figure out a method/function to replace or “a”’s

Answer 1

"Hay!".replace(/a/g, "e")

Answer 2

Use escape character "\"

"Dami's brother says hi".replace(/\'/g, "‘")

Answer 3

How would you replace characters like this? (“ and ‘ and ` )
Would you use this?
“Dami’s brother says hi”.replace(/‘ ‘/g,””)?