How does “Poor Boy Blues” end?

What will be an ideal response?

• The music stops (all the instruments drop out) and,
• unaccompanied, Lucas sings the words "please have mercy on poor boy" (this is known as a vocal tacet).
• Instruments quickly re-enter and end on a held note.
A Blues Song in the Making (CD 1:22) "She Got Me Walkin'"
Follow the accompanying Close Listening guide as you listen to CD 1:22,"She Got Me Walkin'" (Lazy Bill and His Blue Rhythm).