I have a question about natural accidental and its scope inside a bar. As far as I know, all accitentals should last until end of the bar and they affect all following notes on the same line in this bar, unless they're canceled by another following accidental.
However, the following score is a bit confusing to me:
If the natural sign lasts until end of the bar, then the accidental at the note number 2 shouldn't be necessary. And if it would affect only immidiately following note, then accidental at the note number 6 wouldn't be necessary.
Is the the accidental at number 2 just redundant - only for clarity reasons?