Whichis a combination of individual pieces that create a longer musical work?

Natural minor half steps between scale degrees 3 and 4; 7 and 8 harmonic minor half steps between scale degrees 2 and 3; 5 and 6 ascending melodic minor half steps between scale degrees 2 and 3; 5 and 6; 7 and 8 major half steps between scale degrees 2 and 3; 7 and 8

How did duke ellington create a new musical style that grew out of the ragtime tradition?

How does the character of the fourth movement compare with the first three? consider such factors as tempo, texture, rhythmic character, and melodic themes.