Answer:(1) There are 4 beats per measure that I count along with Dippermouth Blues. (2) The Dippermouth sounds different from the Joplin rags because the Joplin rags is faster than the Dippermouth Blues. (3) Both accompaniment patterns of the rhythm section of Dippermouth Blues and Joplin rags stayed constant for the entire piece. (4) The "stop-time" occurred in the song in the middle part. (5) The "stop-time" started at 0:38 seconds until 1:08. (6) The band plays stop-time to feature regular accented attacks on the first beat of each measure, alternating with an instrumental solo. (7) It enhances the solo instrument played in the music; it gives highlights to the wind instrument played in the music.
Step-by-step explanation: