In the key of A minor, the tonic (I), sub-dominant (IV) and dominant seventh (V7) chords are Am, Dm and E7 respectively.
* These notes are played together even though they are on opposite sides of the stem.
EX. 62 uses these chords in arpeggio form. Note the 4th finger pivot between the Dm and E7 chords.
When a note is sharpened it remains sharp until cancelled by either a natural sign or a bar line. Thus the last note in bars 3 and 7 is G# even though there is no sharp sign placed directly before it.