Music-the evolution from the sackbut to the trombone

Sackbut is the earlier creation of the trombone
-what is a sackbut
-what does it sound like
-what does it look like
When was the sackbut used and played
-who were composers for the sackbut
-what instruments played with this instrument
-what was the importance of the sackbut
-when did it become a trombone

II
History of trombones
-what is a trombone how many types are there
-what does it resemble
-composers for trombone
A.MOtzart recreum
B.beethoven symphony #9
C.moravian trombone in America
-what era was the trombone played in?
A.jazz
-who played with it
A. Trummyong-kid Roy
B. J.J. Johnson