Does anyone have advice to give on how to be a better singer?worth 11 points

sing with your diaphram, make it nice and strong and dont sing with your nose because you might sound weird and unrefined. when you are breathing in to sing expand your stomach then when you let out your breath to sing tighten your core putting pressure onto your diaphram.

Explanation:

they most likely have a instrumental version. just look it up on google.

it seems to me that yes they solo on the chord changes.  coltrane for sure solos on the chord changes. instead of changing scales, they use a different method over the chord changes. this melody is very  unique but may often times even be considered simple, which is quite common in this modal  type. for example, there are changes from the key of minor to major in this piece, which makes it  unique in its own way.