How many units are in between the distance of (−4, 9) and (−4, 3)?

How many units are in between the distance (−4, 9), (−4, 3), and (1, 3)?

How many units are in between the distance (−4, 9), (−4, 3), and (−4, −8)?

Thank you!

nobody answered my last one lol, you aren't required to answer all of these I guess but at least one would be a big help!