Video music analysis

1.     Compare the following four jazz-based songs in a minimum of 800 words. Identify, time-stamp, and describe the following African-American modalities of music-making: (a) Timbral Flex, (b)Improvisation, (c) Polyrhythm, (d) Socio-Functionality, (e) Call & Response, (f) Syncopation, (g)[Imitative] Vocalization. Also compare  instrumentation.     https://www.youtube.com/watch?v=d1QnzTnhcw0   https://www.youtube.com/watch?v=TYLbrZAko7E   https://www.youtube.com/watch?v=DP_NRCxmAA4   https://www.youtube.com/watch?v=L_XJ_s5IsQc