Excuse me, I'm new to jazz studies. I'm a bit old school and I am writing out my own charts, which is another way of saying that I'm too broke to buy an ipad. Anyway... If I'm writing a chart to a song that is in 'a minor' no sharps or flats in the key signature, and I'm writing for, say / b minor / E7 / a minor / is it convention to write / ii / V / i or / vii / III / vi ? This is for my own use to make it easy for me, but I guess I may as well learn correctly from the start. Thank you.