Thanks @ToddWilcox--that is indeed confusing. The B4 is not related to the pitch but is actually a reference to one of the rules presented in the chapter.

@Aaron great point--I guess I thought it was implied, since they say that the options they present are not the only ones and because they don't explain every chord. I see they refer to the I, V, II and/or IV chords, but they dont elaborate on the use of inversions as seen, for example, in the 4th and 6th chords in the progression

Thank you. I figured I was miscounting, and I appreciate the explanation here.

@JohnBelzaguy thank you very much for your response to this question. I'm wondering 1) in the case of the bass guitar, can an "8" be placed under the bass clef for a two octave transposing clef? and 2) would the octave transposing clef in your second image above become less useful as you play higher and higher pitches with the guitar? Obviously the low E string (which requires 3 ledger lines) is the floor for the guitar, but the ceiling presumably goes inconveniently high?

@PiedPiper thanks--it's insightful (honestly I didn't check it out originally because I didn't know what the G clef was), but doesn't tackle the issue of a non-transposed solution, if that makes sense