The key is in D major which means your do will be D (first space under the staff) I will give you the first measure:
Do Do Re Mi
Answer
it could be a few things like it could be what is happening in the back round or what the people in the painting are doing/expressions look like
Explanation:
i don't know if this helped but yeah
Answer:
compositional flow
Explanation:
this allows you to control where the viewers eyes go and what they see first and notice before really looking in dept
I need a picture of the painting to help you