Answer:
Step-by-step explanation:
All scales will sound in octaves in an orchestra setting; arpeggios sound in parallel sixths. An attempt was made to have each instrument begin in an “effective” part of its range: i.e., first position on it’s lowest string.
The bass parts are necessarily the hardest since a range of two octaves will require very high shifts. Nevertheless, no attempt was made to “ down” this part. Good bass players have to learn to shift too.