Shapes derived from mechanical , human -made objects

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

Which of the following is not a characteristic of bebop? reharmonization and chord substitution common emphasis on improvised solos new repertoire created from jazz standards using new melodies general attitude of restraint, tranquility

The first c.d. was released after the phonograph. 75 years 200 years 100 years 50 years