#1
For an accending melodic scale you raise the sub-mediant and leading note one semitone.

And on the descend you play the scale naturally.

Correct? Just wasn't sure.
Thanks in advance.
#4
yeah the one you are asking about is the classical melodic minor, it is played differently ascending than it is descending because of the melodic motion in classical minor works.
If you play it with the natural sixth and raised 7th, then it is referred to as the jazz melodic minor (but mostly just called the melodic minor in contemporary music)